diff --git a/boxes/generators/ottolegs.py b/boxes/generators/ottolegs.py
index b776265..edfa835 100644
--- a/boxes/generators/ottolegs.py
+++ b/boxes/generators/ottolegs.py
@@ -35,8 +35,11 @@ class OttoLegs(Boxes):
         self.addSettingsArgs(edges.FingerJointSettings, finger=1.0, space=1.0,
                              surroundingspaces=1.0)
         self.argparser.add_argument(
-            "--anklebolt",  action="store", type=float, default=2.5,
-            help="diameter for hole for ankle bolts")
+            "--anklebolt1",  action="store", type=float, default=2.5,
+            help="diameter for hole for ankle bolts - foot side")
+        self.argparser.add_argument(
+            "--anklebolt2",  action="store", type=float, default=3.2,
+            help="diameter for hole for ankle bolts - leg side")
 
     def foot(self, x, y, ly, l, r=5., move=None):
         if self.move(x, y, move, True):
@@ -59,7 +62,7 @@ class OttoLegs(Boxes):
         
     def ankle2(self):
         # from vertical edge
-        self.hole(15, 10, self.anklebolt/2)
+        self.hole(15, 10, self.anklebolt1/2)
 
     def servoHole(self):
         self.hole(6, 6, 11.6/2)
@@ -86,7 +89,7 @@ class OttoLegs(Boxes):
             self.rectangularWall(lx, lh-7., [LegEdge(self, None), "f", "F", "f"], callback=[None, lambda:self.fingerHolesAt(ws-7., 0, lx)], move="right")
             # back
             self.rectangularWall(lx, lh, "FfFf", callback=[
-                lambda:self.hole(lx/2, 7, self.anklebolt/2)], move="right")
+                lambda:self.hole(lx/2, 7, self.anklebolt2/2)], move="right")
             # sides
             self.rectangularWall(ly, lh, e, callback=[None,
                 lambda:self.fingerHolesAt(ws, 7.0, ly-7.0)], move="right")