Air assist nozzle and dual line-laser holder for the K40 style Chinese laser cutters.
Works with cheap 12mm line laser pointers available on all good auction sites etc.
This is a remix of 2 great designs and, I hope, combines the best of both. I've closed the air-channel in the top of the AA cone to allow for a set-screw to mount the holder, hopefully this will be enough. if not I'll probably revisit and add some screw holes to the right laser holder so it can be mounted through the mirror/lens holder frame.
Update 12/10/2015 - Added the ball-type holders for the 12mm laser modules.
I've tried this several different ways, if you've got a small enough diameter pipe (<6mm) then no supports should work fine as you can slide the pipe in far enough
Imported the original .stl files into Sketchup, broke apart and rebuilt as required. Used Solid Inspector plugin to make sure it all looked good