A fitting to control the depth of cut when doing PCB routing with this setup: http://www.thingiverse.com/thing:225465Print with support 3mm bolt/nut to clamp the assembly on. Tested with Proxxon IBS/E Calibrating router depth: 1.Place router bit in the collet with too much of the bit protruding beyond the clamp. Note that you will need to use a vacuum cleaner to remove the dust as it prints. Dust buildup under the slider stops the bit getting to the set depth and the cutting will fail.