diff --git a/README.md b/README.md
index 632476d..b9b7edf 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 Design of a highly experimental recumbent tricycle, not software at all.
 
-![Subframe and four bar linkage](subframe-and-fourbar.png)
+![Latest render](sketches/latest-render.png)
 
 ## Status
 
@@ -14,12 +14,12 @@ The current model is built with [OpenSCAD](https://openscad.org/); to render the
 
 The following libraries are used into this model. They should be downloaded and installed into your [OpenSCAD library directory](https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Libraries), which on Linux systems is usually `$HOME/.local/share/OpenSCAD/libraries`.
 
-| Library                                                      | Referenced as      | Author                                                       | Licence                                                      |
-| ------------------------------------------------------------ | ------------------ | ------------------------------------------------------------ | ------------------------------------------------------------ |
-| [BentSim](https://github.com/PRouzeau/BentSim)               | BentSim            | [Pierre Rouzeau](https://rouzeau.net/)                       | [GPL](https://github.com/PRouzeau/BentSim/blob/master/LICENSE) |
-| [Sprocket Generator V2](https://www.thingiverse.com/thing:3059422) | SprocketGenerator2 | [Hampus Andersson](https://www.thingiverse.com/haand001/designs) | [Creative Commons Attribution](https://creativecommons.org/licenses/by/4.0/) |
-| [NACA Airfoils - 4 digit fully parametric](https://www.thingiverse.com/thing:898554)] | NACAAirfoils       | [Rudolf Huttary](https://www.thingiverse.com/parkinbot/designs) | [Creative Commons - Attribution - Non-Commercial](https://creativecommons.org/licenses/by-nc/4.0/) |
-| [The Belfry OpenScad Library, v2](https://github.com/BelfrySCAD/BOSL2) | BOSL2              | Numerous contributors                                        | [BSD 2-Clause](https://github.com/BelfrySCAD/BOSL2/blob/master/LICENSE) |
+| Library                                                      | Referenced as      | Author                                                       | Licence                                                      | Notes                                                    |
+| ------------------------------------------------------------ | ------------------ | ------------------------------------------------------------ | ------------------------------------------------------------ | -------------------------------------------------------- |
+| [BentSim](https://github.com/PRouzeau/BentSim)               | BentSim            | [Pierre Rouzeau](https://rouzeau.net/)                       | [GPL](https://github.com/PRouzeau/BentSim/blob/master/LICENSE) | Currently not used; appears to have conflicts with BOSL2 |
+| [Sprocket Generator V2](https://www.thingiverse.com/thing:3059422) | SprocketGenerator2 | [Hampus Andersson](https://www.thingiverse.com/haand001/designs) | [Creative Commons Attribution](https://creativecommons.org/licenses/by/4.0/) |                                                          |
+| [NACA Airfoils - 4 digit fully parametric](https://www.thingiverse.com/thing:898554)] | NACAAirfoils       | [Rudolf Huttary](https://www.thingiverse.com/parkinbot/designs) | [Creative Commons - Attribution - Non-Commercial](https://creativecommons.org/licenses/by-nc/4.0/) |                                                          |
+| [The Belfry OpenScad Library, v2](https://github.com/BelfrySCAD/BOSL2) | BOSL2              | Numerous contributors                                        | [BSD 2-Clause](https://github.com/BelfrySCAD/BOSL2/blob/master/LICENSE) |                                                          |
 
 
 
diff --git a/model/hull.scad b/model/hull.scad
index dca117b..c5677cb 100644
--- a/model/hull.scad
+++ b/model/hull.scad
@@ -34,11 +34,10 @@ module hull_i() {
 
 module hull() {   
     intersection() {
-        translate([2500,0,500])
+        translate([1850,0,500])
             rotate([180, 90, 0])
-            scale([20, 15.5, 20])
+            scale([20, 15.5, 15.5])
             rotate_extrude()
-            //rotate([ 0, 90, 0])
             import("library/hull-volume-of-rotation.svg");
         
         translate([-400,0, 350])
@@ -64,4 +63,4 @@ module hull() {
         }
 }
 
-//hull();
+// hull();
diff --git a/model/tricycle.scad b/model/tricycle.scad
index a80f81a..73fd9f9 100644
--- a/model/tricycle.scad
+++ b/model/tricycle.scad
@@ -9,13 +9,14 @@ include <fourbar.scad>
 include <hull.scad>
 
 rotate([0, 0, 270])
-translate([0, 1200, 180])
+translate([0, 1300, 180])
 subframe(structure="carbon");
 translate([0, 0, 320])
 fourbar(700, 100, 30, 35, 650);
 
-translate([500, 0, 100])
-rotate([0, 3, 0])
+translate([800, 0, 120])
+rotate([0, 4, 0])
+color("forestgreen")
 hull();
 
 /* 
diff --git a/sketches/latest-render.png b/sketches/latest-render.png
new file mode 100644
index 0000000..f3c8dda
Binary files /dev/null and b/sketches/latest-render.png differ
diff --git a/sketches/subframe-bed-schematic.svg b/sketches/subframe-bed-schematic.svg
index 3deb7a9..b5b427a 100644
--- a/sketches/subframe-bed-schematic.svg
+++ b/sketches/subframe-bed-schematic.svg
@@ -9,6 +9,9 @@
    id="svg1"
    inkscape:version="1.4 (e7c3feb100, 2024-10-09)"
    sodipodi:docname="subframe-bed-schematic.svg"
+   inkscape:export-filename="../../blogiv/content/img/subframe-bed-schematic.png"
+   inkscape:export-xdpi="96"
+   inkscape:export-ydpi="96"
    xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
    xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
    xmlns="http://www.w3.org/2000/svg"
@@ -24,13 +27,13 @@
      inkscape:deskcolor="#d1d1d1"
      inkscape:document-units="mm"
      showgrid="true"
-     inkscape:zoom="0.50394254"
-     inkscape:cx="1185.651"
-     inkscape:cy="646.89914"
-     inkscape:window-width="1920"
-     inkscape:window-height="1011"
+     inkscape:zoom="1.4279216"
+     inkscape:cx="600.17302"
+     inkscape:cy="338.60403"
+     inkscape:window-width="2256"
+     inkscape:window-height="1423"
      inkscape:window-x="0"
-     inkscape:window-y="32"
+     inkscape:window-y="0"
      inkscape:window-maximized="1"
      inkscape:current-layer="layer1">
     <inkscape:grid
@@ -132,9 +135,9 @@
          id="tspan5">Not to scale.</tspan></text>
     <path
        style="fill:#333333;stroke:#000000;stroke-width:0.499999;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
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+       d="m 170.84683,165.47093 -0.65956,-18.73945 c -0.009,-1.00751 -0.87344,-2.40589 -2.44613,-2.43622 l -7.6533,0 c -1.18532,-0.0991 -1.96991,1.07942 -2.03306,2.53738 l 0.0977,24.87939 c 0,0 15.15086,-1.80846 21.16125,-3.65677 -5.60227,0.66912 -7.56138,0.23907 -8.46692,-2.58433 z"
        id="path7"
-       sodipodi:nodetypes="cczcczzc" />
+       sodipodi:nodetypes="cccccccc" />
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        style="fill:none;stroke:#000000;stroke-width:0.499999;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
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@@ -283,76 +286,91 @@
          style="fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.1"
          x="103.39312"
          y="188.66234"
-         id="tspan47">moulding)</tspan></text>
-    <path
-       style="fill:#333333;stroke:#000000;stroke-width:0.499999;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
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-       id="path25"
-       sodipodi:nodetypes="cczcczzc" />
+         id="tspan47">moulding, for easier</tspan><tspan
+         sodipodi:role="line"
+         style="fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.1"
+         x="103.39312"
+         y="193.95399"
+         id="tspan26">damage repair)</tspan></text>
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        height="1.0336534"
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+       d="m 134.48556,142.68156 1.05006,-0.26251"
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        style="fill:#999999;fill-opacity:1;stroke:#000000;stroke-width:0.1;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
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+       d="m 134.48556,142.05809 1.05006,-0.26251"
        id="path32" />
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        style="fill:#999999;fill-opacity:1;stroke:#000000;stroke-width:0.1;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
-       d="m 134.48556,142.24944 1.05006,-0.26251"
+       d="m 134.48556,141.87761 1.05006,-0.26251"
        id="path33" />
     <path
        style="fill:#999999;fill-opacity:1;stroke:#000000;stroke-width:0.1;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
-       d="m 134.48556,142.06896 1.05006,-0.26251"
+       d="m 134.48556,141.69713 1.05006,-0.26251"
        id="path34" />
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        style="fill:#999999;fill-opacity:1;stroke:#000000;stroke-width:0.1;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
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@@ -360,8 +378,9 @@
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+         y="123.56631">'Short stud'<tspan
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+   id="tspan18"> inset into XPS</tspan></tspan></text>
+    <text
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+       style="font-size:4.23333px;font-family:'Kells Uncial';-inkscape-font-specification:'Kells Uncial';text-align:start;writing-mode:lr-tb;direction:ltr;text-anchor:start;opacity:0.992424;fill:#ffffff;stroke:#000000;stroke-width:2"
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+         x="100.58082"
+         y="106.2038">'Long stud' <tspan
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+   id="tspan17">through </tspan></tspan><tspan
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