Customized version of https://www.thingiverse.com/thing:1019361

Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=1019361

Using the following options:

length = 100
width = 180
topHeight = 30
botHeight = 70
wall = 2.0
floor = 3.0
backwall = 6.0
maLength = 5.5
maWidth = 5.5
maHeight = 5.5
maSpacer = 1.0
hiHeight = 0.0
hiDia = 3.0
CHAMFEREDGES = 1
CHAMFERLEN = 3.0