jskyler91
Veteran
Glad to see this thread turning into something usefull!
I never used my thumb for F', index finger came natural to me.
And recently I have switched to a "backhand index" for J- (always) and Y-perm (sometimes).
After an R U R' it comes quite naturally to reach down with my right index finger and flick up the F face and continue into R U ... in one fuid motion.
Your right, that is very fluid and it doesn't make your grip slip as often.
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