@ -588,6 +588,7 @@ class Boxes:
4 for second half of the first x side
"""
c4 = (r+self.burn)*math.pi*0.5 # circumference of quarter circle
c4 = 0.9 * c4 # stretch flex 10%
topwidth = self._edgewidth(top)
bottomwidth = self._edgewidth(bottom)