I own 4 different, own-build printers in VERY different sizes. While all the technical things are different from printer to printer, one thing stays the same: This extruder. I tried nearly all on thingiverse and stuck long time on simple working wade-extruder. But ever since upgrading over MK7 to MK8 (which is way better!), I never changed back. This extruder design does it all! Even flexibles, it is the best.