Summary Remix this thing to fix annoying problem. The 'clamp' is some kind unique, the 'idler' is modified and the other parts you need from original 'Airtripper Bowden Extruder' The assembly is little bit complicated now, but you only need to do this once, so it's worth it. It's easy and fast to change filament now! grip-clamp-handle detail should be rotated around Y axis - no supports need that way This page is for another remix that inspires me to this: https://www.thingiverse.com/thing:654004/#files