riffz
Veteran
It takes time to get used to, but it's hard to sub-1 sune without it. Basically you just have to do R U R' and then leave your ring finger on BRU (BUR?) and move your whole hand to the left to do the turn.
I do the second U by pushing on LBU with my left index finger.
Also sub-1 is easy for sune, even with regrips.