Made up a clip to use hardcore Hook & Loop to attach a clip for the Palette2 feed tube onto a dual extruder (Bondtec style).
There is still some PTFE tube between clip and extruder to make it easy to remove (suggest about 10-20mm above the extruder in tube length), just make sure you use cheap PTFE tube with a large internal diameter as the Palette 2 splicing increases the size of the filament making the internal diameter of good PTFE tube too small. Seems to be ok using good tube after the extruder though.
On a side note, anyone looking at buying a Palette 2 I would strongly suggest waiting 6 months or keep and eye on the Mosaic forum and hold of purchasing until the steady stream of problems and complaints stop. What ever you do, don't buy the Canvas Hub as it does not work.
HK ABS or PLA
Print the file with the top of the treads on the build plate, then add a bunch of support. This will ensure the threads are nice and round for a perfect fit (so basically print upside down).