Based on http://www.thingiverse.com/thing:112718 a mount for K8200 or 3drag. Print this file twice http://www.thingiverse.com/download:247402 and the mount. I haven't mounted it yet. So it's untested. For K8200 you need also: 3x Screw M3x35 (to mount the parts together) 3x Nut M3 2x Screw M5x20 (to mount it on K8200/3drag Z-Axis) 1x 8mm hardened shaft. 450mm 2x 8mm fixing Ring (to fix the Shaft in upper bearing of Z-Axis) For the Threadless Nut itself you need according to http://www.thingiverse.com/thing:112718: 6 x 623 ZZ ball bearings. 3 x10 x 4 mm. 6 x Screw M3x12 6 x flat washer (for giving Space to Bearing) 8 x M3 Nut 2 x M3x20 For all who uses a second Z-Axis on K8200/3drag with this thing http://www.thingiverse.com/thing:311980 I have made the holder/base for the other side. It's actually printing . untested - so no warranty ;-) I have added a 24 teeth T5 Pulley for 8mm blank shaft. It contains 2 drills for M3 screw/nut fixing. This is also for the 2nd Z-axis as mentioned above. Edit 25.7.2014: 3 pictures added Edit 26.7.2014: Work finished. Added a picture with calibration tips. Have fun with this nice solution.