some fixes

chassis/chassis.scad

@@ -7,14 +7,16 @@ difference(){
             linear_extrude (height=25)
             import (file="chassis.dxf", layer="chassis-fixation-moteur", $fn=100);  
     }
+    
    union(){
-       translate([-50,38.8,5.2])
+       translate([-50,38.8,5.5])
        rotate([0,90,0])
         cylinder(h = 150, r1 = 1.5, r2 = 1.5, center = true/false, $fn=100);
        
-       translate([-50,38.8,23.2])
+       translate([-50,38.8, 23])
        rotate([0,90,0])
         cylinder(h = 150, r1 = 1.5, r2 = 1.5, center = true/false, $fn=100);
    }
+   
 }