MMU2s, Wipe Tower, and issues when slicing for small nozzles
I've recently been printing PETg using a small (0.2mm, I've based my settings on the 0.25 profiles) nozzle. Although there doesn't appear to be any official support for small nozzles (there's a 0.25 single profile but no 0.25 multi-material) I haven't had too many problems, with one caveat:
The wipe tower looks like crap, sheds filament, appears to underextrude when creating the bridge spacers, and generally needs to be babysat to ensure it doesn't wreck my model. This is not ideal.
I suspect that the problem is slicer related. Since the model prints just fine and the bridge segments look underextruded my working theory is that some max speed setting somewhere isn't being honored by the wipe tower. I plan to test this further by slowing down the print massively for one run and changing the spacer distance to 0 on another. Both should in theory fix the problem's symptoms but neither gets to the cause. There aren't a lot of wipe tower options to configure; I want to double the width of the spacers as a test too but I don't see any such option.
Does anyone have experience using the mmu2 with small nozzles, or have any ideas I haven't considered?