Customized version of http://www.thingiverse.com/thing:121479

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=121479

Using the following options:

rimThickness = 1.5
screwHoleSize = 2
ContentZSize = 2
rimHeight = 3.0
wallThickness = 4
screwSize = 1.5
ContentYSize = 54.0
screwHeadHeight = 2.6
ContentXSize = 109.0
screwHeadWidth = 3
tolerance = 101