My M510 series Deore shifters seem to be giving up the ghost; either slipping or requiring full (extended) thumb press to engage the next gear. I'm looking to possibly upgrade to the M770 series XT (9 seed), but with the difference in derailers, wanted to make sure there would not be any compatibility issues. These will be used to mate with an M510 FD and M750 RD (until those are eventually upgraded). Any compatibility concerns?
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