Here's an updated link to the ultimaker forum
https://community.ultimaker.com/topic/4058-ultimaker2-feeder-system-improvements-and-ideas (not sure what page the original referred to since it doesn't seem to be the same).
Anonymous
over 9 years
I have used this version with different materials and only when I use flexible filament there are problems.
Are you willing to give me the CAD file so that I can make some adjustments?
UltiArjan
over 10 years
I did not really count, but I probably printed at least 50 hours with it now without any problem.
map76
over 10 years
Works like a charm. Much better than the stock feeder. No more under-extrusion.