This is a FIX for Prusa MINI clog and under-extrusion based on our tests.
We shared the STEP FILE so you can make other PTFE sizes and test yourself.
We fixed our underextrusion / extrusion / clog problems on Prusa Mini just cutting the original Hotend PTFE tube to around 40mm and pushing the heatbreak all into the top like this video:
We also add new thermal paste.
Can you comment and share your test and results?
You can buy PLA, PETG filament and others here
www.evolt.pt
(to shipping worldwide, just send an email)
The author hasn't provided the model origin yet.