To clarify, this is something that’s working fine in every version before 4.7.2. Here’s how the right and left extruder look in 4.7.0:
It looks like you’ve found the bug though. The configs in the above picture (including the ones I sent you) are built around having ‘standard’ PLA on the main extruder (left for me) and ‘breakable’ PLA on the second extruder (right for me). So in all my tests I have standard black PLA on the left extruder and breakable white PLA on the right extruder. For the record, I have custom materials set up for each of those as well, but they’re in the same categories as the defaults:
Here’s where the bug gets complicated. In 4.7.2, if I change my right extruder to be standard PLA instead of breakable, my “GAB” configs are available:
However, when I switch my right extruder back to breakable PLA, and I duplicate one of the default support configs (that are showing up on the right extruder), that duplicate DOESN’T show up on the right extruder - it only shows up on the left extruder:
Final conclusion: For some reason, macOS Luban 4.7.2 is hiding all user-created configs for extruders that have “breakable support” materials applied to them.
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One big silver lining to all this is that it looks like the support skirt issue was fixed when changing how parameters are read, so don’t mess that part up when you fix this bug.