Y'all are missing an important key bit of info in the OP:
Avid/SRAM brakes = DOT fluid
Shimano brakes = mineral oil.
No way. No how. Period.
IF we were talking about Shimano to Shimano road to mtn lever swaps? Sure. Things work fine pretty well across the board.
Ditto with Avid/SRAM to Avid/SRAM
Things get a little more interesting when going from TRP to Shimano, etc
M
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