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:

screwHeadWidth = 4.5
rimHeight = 3.0
wallThickness = 3.2
screwHoleSize = 2.6
rimThickness = 1.5
screwSize = 2
ContentXSize = 38
tolerance = 0.5
ContentYSize = 70
ContentZSize = 25
screwHeadHeight = 1.6