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diff --git a/chassis/chassis.dxf~ b/chassis/chassis.dxf~
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   0
 SECTION
diff --git a/chassis/chassis.png b/chassis/chassis.png
index 9f2d543..dd7917a 100644
Binary files a/chassis/chassis.png and b/chassis/chassis.png differ
diff --git a/chassis/chassis.scad b/chassis/chassis.scad
index cc042ac..4a9dc50 100644
--- a/chassis/chassis.scad
+++ b/chassis/chassis.scad
@@ -1,14 +1,40 @@
 difference(){
     
-    union(){
+    union(){    
         linear_extrude (height=3)
             import (file="chassis.dxf", layer="chassis", $fn=100);
+        
+        //pates de fixation des moteurs
         translate ([0,0,2.99])
             linear_extrude (height=25)
-            import (file="chassis.dxf", layer="chassis-fixation-moteur", $fn=100);  
+            import (file="chassis.dxf", layer="chassis-fixation-moteur", $fn=100);
+      
+        
+      
+       
+  //fixation 3ème roue
+  hull(){    
+      
+              translate ([0,0,2.99])
+            linear_extrude (height=1)
+            import (file="chassis.dxf", layer="3emeRoueG", $fn=100);
+        
+        translate ([18.5,-26,23])
+            sphere(r=1.5, $fn=50);
+        }
+        
+         hull(){    
+            translate ([0,0,2.99])
+            linear_extrude (height=1)
+            import (file="chassis.dxf", layer="3emeRoueD", $fn=100);
+        translate ([31.5,-26,23])
+            sphere(r=1.5, $fn=50);
+        }
     }
     
    union(){
+       
+       //trous pour les vis
        translate([-50,38.8,5.5])
        rotate([0,90,0])
         cylinder(h = 150, r1 = 1.5, r2 = 1.5, center = true/false, $fn=100);
@@ -16,6 +42,12 @@ difference(){
        translate([-50,38.8, 23])
        rotate([0,90,0])
         cylinder(h = 150, r1 = 1.5, r2 = 1.5, center = true/false, $fn=100);
+     
+      
+       //14.25
+              translate([-50,-26, 18])
+       rotate([0,90,0])
+        cylinder(h = 150, r1 = 1.5, r2 = 1.5, center = true/false, $fn=100);
    }
    
 }