diff --git a/boxes/generators/display.py b/boxes/generators/display.py
index afac626..686cc2a 100644
--- a/boxes/generators/display.py
+++ b/boxes/generators/display.py
@@ -41,7 +41,7 @@ class Display(Boxes):
         a = self.angle
         t = self.thickness
 
-        self.roundedPlate(0.7*x, x, r, "e", move="up")
+        self.roundedPlate(0.7*x, x, r, "e", extend_corners=False, move="up")
 
         oh = 1.2*h-2*r
         if a > 0:
diff --git a/boxes/generators/laserclamp.py b/boxes/generators/laserclamp.py
index be3fcf8..9d6dd48 100644
--- a/boxes/generators/laserclamp.py
+++ b/boxes/generators/laserclamp.py
@@ -91,6 +91,7 @@ parts sliding on each other to reduce friction.
         
         self.topPart(h_max+h_extra, move="right")
         self.bottomPart(h_min, h_extra, move="right")
-        self.roundedPlate(4*t, h_min+h_extra+4*t, edge="e", r=t, move="right",
+        self.roundedPlate(4*t, h_min+h_extra+4*t, edge="e", r=t,
+                          extend_corners=False, move="right",
             callback=[lambda: self.fingerHolesAt(1*t, 2*t, h_min+h_extra)])
         self.rectangularWall(1.1*t, h_min+h_extra, "efef")