I finished the upgrade. The new extruder seems more reliable. I think I may have to increase retraction a bit.
Is anyone else finding they need to fine tune any settings post-upgrade?
I'm thinking the same also... either that or the extrusion rate... the filament seems to be 'backing up' a bit more than it used to... the clunks are back particularly when the printer is doing infill in long straight lines... it seems to be feeding too fast and backing up.