This is just a remix of telemah's: "MK7/QU-BD hotend mount for deltabot" (http://www.thingiverse.com/thing:37617) Makes the qubd hotend stick out And also his "v2" (http://www.thingiverse.com/thing:45535) Makes it stick in(gain more print volume in your z) This is for 1.75mm filament and is made to fit a 4mm x 1/8" pneumatic fitting adapter (http://www.ebay.com/itm/321061698459?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649) instead of the screwed nut on ptfe. I have yet to try it but i intended to use v2 on my ord bot hadron so that i can mount and use the qubd hotend only, the mounting holes will fit the standard 50mm wide mounting holes (wades extruder).Just be sure to screw the fittings in while the piece is still hot, to avoid any delamination, this will be a nice tight fit.