Could you please publish a 3D model of the 3DChameleon Mk3 B and C parts?
I printed the files linked below and upgraded from Mk3 to Mk4.
https://www.printables.com/model/354998-3dchameleon-mk4-upgrade-parts-with-ptfe-grip
The notching of the PTFE tube is an interesting idea. However, it wastes PTFE tubes because they easily tear from notches. Also, if the tube is not notched well, the hole will be narrow and prevent filament loading. On the other hand, using of brass compression fittings is more costly, but allows for smoother filament loading than notching.
In case Mk3 B and C parts are damaged, it would be appreciated if you could publish the files of them.
Sure. I've added them to the Mk4 upgrade parts Printables here: https://www.printables.com/model/354998-3dchameleon-mk4-upgrade-parts-with-ptfe-grip