Customized version of http://www.thingiverse.com/thing:1102812

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=1102812

Using the following options:

BoltHeadDiameter = 8
SlotCount = 7
AngleDegrees = 45
ArmThickness = 4
ArmWidth = 9
BackThickness = 4
BoltDiameter = 5
FilletRadius = 6
$fn = 50
SlotWidth = 7
AngledLength = 4
Height = 32
BoltCount = 3
Depth = 75
HoleStyle = 1