This is a mount I made for the semi-standard Prusa extruder to create a rigid mounting scheme for the Dragon Trianglelab hotend. Hopefully to improve retraction rates, and make the true one handed nozzle change on a prusa possible, with very little modification.

The idea is to use a modifier in PrusaSlicer, and remove a keyed section in the Extruder Motor Plate where this portion slides into. So the squared section will keep the hotend from rotating in the extruder. I extended the key to the outer diameter?* of the mount. So getting it done as a modifier shouldn't take much work, just eyeball it and slice, and look at the fit to make sure it bottoms out.

I sized the dimensions off of the e3d v6 heat sink but I haven't got a Dragon hotend to test this on yet, so good luck. I made the bore at the top specifically to use the E3D Embedded bowden coupling. I plan on ordering some to test fit myself and see if the metal inserts will work in plastic.

The screws are pre tapped M2x.04 screws with a 5mm depth, a little bit of loctite and I'm sure they won't move unless the whole thing just shears.

I'm going to print in BLACK PETG, So I'm not taking risks of messing with my filament sensor, no reason it should. but it can't hurt.

I hope you like the print, and if it works for you, let me know.

Edit: Didn't sit right with me, there is a plastic insert variation for bowden tubes and the original wouldn't fit those. So I altered it to fit one. Still untested and the shear point between the bowden couple piece and the stem seems a bit thin. But the new version has a 7.7mm tall key compared to the 3.7mm of the original. I'll be buying couplers for both to test them. v2 is the original, v6 is the plastic insert variation.

Final Revision(I think): This final setup has both the required Motor plate modification and the E3D style adapter. The E3D part still uses the M2 screws, and the Embedded Bowden Coupling for Plastic. The two things I don't know about working are the Coupling sitting flat enough on the top of the E3D copied part to fit in the motor plate, and if the coupler needs the lower portion of the Adapter to bite into. My parts should get here soon.