Kossel Spool Holder 1515

Based on the work of blah_59, I created a version of his threaded rod mounts suitable for 1515 extrusions.
The OpenSCAD file he shared was edited by me. I have also made it compacter and converted it to fit M3 bolts and nuts.

I have chosen to use these as mounts for the M8 threaded rod and not the ones that mateddy links to in his instructions.
The reason for this is easy exchange of filament spindles. No need to unscrew the rod, just lift it out of the mounts.

[Update 29-03-2015]
I have added an updated version with 2 holes for fastening on the extrusion. It now also has closed sides, so it is impossible for a threaded rod to unscrew itself from the mounts and ruins either your print, diagonal rods, printbed or all of the above...

Yes, this happened with me somehow and broke my borosilicate glass. :-(
So when using the open version, make the threaded rod long enough to terminate the rod with an M8 nut.

Print the new version double, mirroring the 2nd one for the