UM2 extruder upgrade feeder vs Bondtech feeder. Why Bondtech? in Modifications, third party add-ons & other hardware Posted August 10, 2016 yes. And there is the suggestion that having higher resolution means you can feed more precisely when printing really tiny amounts like making a tree frog smaller than a pea with a .1mm nozzle but I doubt even then it makes much difference. But I don't know. Maybe it helps. Well, I have not even got to playing with my 0.25 nozzle yet, and I have a 0.15 to play with, so a tree frog is in my future, but I think I will see what I can get out of my UM2+ feeder before I go blowing a bunch more money. (Though that matchless nozzle looks sexy!) Thanks again for the thoughtful insights.