Customized version of http://www.thingiverse.com/thing:415391

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=415391

Using the following options:

OverDepth = 5
Window = 0
MountingBoltSize = 3
CornerRadius = 1
Thickness = 1
UnderDepth = 7
GpsBase = 38.5
Shelf = 2.5
CableHolePos = 16
Tolerance = 0.2
CableHoleW = 10
CableHoleH = 4
PCB = 1.7
MountingCentres = 20