Made with ABS on a Replicator 2X. Had to scale it to 101% to compensate for the ABS's shrinkage. The one on the far left was too big at 102%. The all-white stub was at 100% and was too small. The third one was at 101% but failed because I was trying on-the-fly filament swapping. I failed. And lastly, the 4th one was a success, even with on-the-fly filament swapping. At 101%, it fits well, but there's still a little wiggle room. Maybe next, I'll try 100.5%?

Customized version of http://www.thingiverse.com/thing:40703

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=40703

Using the following options:

pattern_rotation = 0
pattern_radius = 8
iphone_version = 1
pattern_overlap = 9
pattern_thickness = 29
pattern_shape = 6
build_plate_selector = 0
case_thickness = 2.4