diff --git a/model/fourbar.scad b/model/fourbar.scad
index 3f07b39..873e75c 100644
--- a/model/fourbar.scad
+++ b/model/fourbar.scad
@@ -16,7 +16,7 @@ $fn=64;
 // learned 60 years ago. There REALLY should not be any unexplained
 // numbers.
 
-module fourbar_leg(length=1000, chord=100, lat_skew=35, long_skew=30) {
+module fourbar_leg(length=800, chord=100, lat_skew=35, long_skew=30) {
     h = length * cos(lat_skew) * cos( long_skew);
     w = length * sin( lat_skew);
     d = length * sin( long_skew);
@@ -68,14 +68,14 @@ module fourbar_axle_half( length=1000, chord=100, lat_skew=35, long_skew=30, sho
     
     // lower knuckle
     rotate([0, long_skew, 0])
-        translate([(0 - (chord*1.25)), (l_hlb * cos(rise) + 72), -62])
+        translate([(0 - (chord*1.25)), (l_hlb * cos(rise) + 72+60), -62])
             lower_bar_end_knuckle(chord, 12, rise, lat_skew);
     
     rotate([0, long_skew, 0])
-        translate([(0 - (chord*1.25)), (l_hlb * cos(rise) + 155), -62])
+        translate([(25 - (chord*1.25)), (l_hlb * cos(rise) + 155+60), -62])
         wheel();
     rotate([0, long_skew, 0])
-        translate([(0 - (chord*1.25)), (l_hlb * cos(rise) + 115), -62])
+        translate([(25 - (chord*1.25)), (l_hlb * cos(rise) + 115+60), -62])
             rotate([90, 0, 0])
                 color("silver")
                     cylinder( h=1.5, r=75);
@@ -99,5 +99,5 @@ module fourbar(length=1000, chord=100, lat_skew=30, long_skew=30, shoulder=650)
 }
 
 
-// fourbar(length=1000, chord=100, long_skew=30, lat_skew=35, shoulder=650);
+ fourbar(length=800, chord=100, long_skew=30, lat_skew=35, shoulder=650);
 // fourbar_axle_half();
\ No newline at end of file
diff --git a/model/lowerknuckle.scad b/model/lowerknuckle.scad
index 4377230..6f67cee 100644
--- a/model/lowerknuckle.scad
+++ b/model/lowerknuckle.scad
@@ -71,33 +71,41 @@ module lower_bar_end_knuckle_old(chord=100, pivot_radius=12, rise=8,lat_skew=30)
 module lower_bar_end_knuckle(chord=100, pivot_radius=12, rise=8,lat_skew=30, colour="blue") {
     l_body=chord * 2;
     w_body=pivot_radius * 2.5;
+    h_body=70;
     h_axis=pivot_radius * 2.75;
+    v_axis = 0;
     
     difference() {
         union () {
             // (more streamlined) body
-            translate([160, w_body/2, -22])
+            translate([158, 0, -22])
                 rotate([0,0,180])
                     scale([1, 2, 1])
                         color( colour)
-                            airfoil(h=70, L=l_body);
+                            airfoil(h=h_body, L=l_body);
             // boss for wheel axle
-            translate([ chord * 0.25, w_body * 0.9, 0])
+            translate([ chord * 0.25, w_body * 0.4, 0])
                 rotate([90, 0, 0])
                     color( colour)
                     cyl(h=w_body * 1.25, r=20, rounding=5); 
-
+            // airfoil stub to be epoxied into the lower bar of 
+            // the linkage
+            translate([chord*1.25, 0 - pivot_radius, 30])
+                rotate([90 + rise, 360 - lat_skew, 0])
+                    color( colour)
+                        airfoil(h=chord, L=2 - chord);
         }
         // scoop for leg-bottom knuckle to rotate within
-        translate([ chord*0.25, w_body/2, h_axis])
+        translate([ chord*0.25, v_axis, h_axis])
             rotate([0, 90, 0])
                 cylinder(h=chord, r=pivot_radius * 1.3);
-        // space for the airfoil leg to emerge
-        translate([ chord*0.25, w_body*.75, pivot_radius * 2.25])
-            rotate([lat_skew + 45, 0, 0])
-                cube([chord, pivot_radius * 4, pivot_radius * 4]);
+        // space for the airfoil leg to emerge. TODO: This shape is
+        // NOT right, and a square section is not what's called for!
+        translate([chord*0.75, v_axis, h_axis])
+            rotate([lat_skew, 0, 0])
+            prismoid([chord, pivot_radius*2.6], [chord, chord], h=chord);
         // through hole for pivot axle
-        translate([-1, w_body/2, h_axis])
+        translate([-1, v_axis, h_axis])
             rotate([0, 90, 0])
                 cylinder(h=250, r=pivot_radius/3); 
         // through hole for wheel axle  
@@ -105,33 +113,35 @@ module lower_bar_end_knuckle(chord=100, pivot_radius=12, rise=8,lat_skew=30, col
             rotate([90, 0, 0])
                 cylinder(h=w_body * 1.4, r=12.5); 
         // slice off the front bottom
-        translate([chord * 1.25, w_body/2, 0 - w_body])
+        translate([chord * 1.25, 0, 0 - w_body])
             rotate([270-lat_skew, 0, 90])
                 color( colour)
                     cuboid([2* w_body, 2*w_body, l_body *.75]);
         // slice off the upper back
-        translate([0, w_body/2, w_body * 2.5])
+        translate([0, 0, w_body * 2.5])
             rotate([270-lat_skew, 0, 90])
                 color( colour)
                     cuboid([2* w_body, 2*w_body, l_body *.75]);
-    } 
-
-    // airfoil stub to be epoxied into the lower bar of 
-    // the linkage
-    translate([chord*1.25, 1, 30])
-        rotate([90 + rise, 360 - lat_skew, 0])
+        // radius the top
+        translate([158 - l_body/2,0,h_body-(w_body/2) - 22])
             color( colour)
-                airfoil(h=chord, L=2 - chord);
-    
-//    // brake disk
-//    translate([(0 - (chord*1.25)), (l_hlb * cos(rise)), 1])
-//        rotate([90, 0, 0])
-//            color("silver")
-//                cylinder( h=1.5, r=75);
-//    // wheel (obviously)            
-//    translate([(0 - (chord*1.25)), (l_hlb * cos(rise)), -10])
-//        wheel();
-
+            scale([1, 1.6, 1])
+                difference() {
+                    translate([0, 0, w_body/4 + 1])
+                    cuboid([l_body, w_body, w_body/2]);
+                    rotate([0, 90, 0])
+                    cylinder( h=l_body + 2, r=w_body/2, center=true);
+                }
+    // radius the lower surface
+         color( "blue")
+         difference() {
+            translate([60, 0, 10])
+                cuboid([l_body + 4, w_body*1.6, 80]);
+            translate([127 - l_body/2, w_body * 0.8 +1, 179])
+                rotate([90, 0, 0])
+                    cylinder( h=w_body *1.6 + 2, r=l_body);
+         }
+    } 
 }
 
 //translate([-125, 0, 0])