i had a 05pro3 for a long time. for crabbing, I notice sometimes the little bar that the fader knob is on can get kinda pushed/dented or just rounded off from hitting the edge so hard so many times. same with the far edge of the fader. sometimes if you scratch mostly on one side, you can take them apart and flip them around, but i used to put (very carefully) a layer of built up super glue on the edge of the fader slot. this helped in keeping the end portion of fader swing very small and tight, and also sort of bounced the fader back toward the middle when you're going fast.
since my mixer is way older than the shit you guys have, i'm not necessarily recommending this, but it really helped with crabs in particular.
also, little exercises like going 1-2-3-4-3-2-1 click crabs for warming up really help to get your fingers loose.
it's been a while, i think i'm gonna get my crab on