When I printed the LFS_Elephant I printed with the original feeder at 100mm/s and 0.3mm layer 24% infill means 12mm^3 per second...LePaul wrote:.... I am going to install the Ultimaker 2+ Extruder upgrade soon, so I can print with more materials and reliably!.....
and as I wrote before... I think that the original feeder must only be assembled correctly (I mean respecting the good rules for a mechanical assembly) to do it's job nice
But if you like to spend money for a new feeder which will have the same problem of grinding of the old one... it is a choice... I write this because there is no difference between the old one and the new one if you look at the part in contact with the filament..
And more power (looking at the gears, its stepper motor can put 3.27 times more force) to grind the filament... and this cannot solve the problem... IMHO