Okay thanks guys. Haven't had much spare time to
finish (ty,vicks!) project off yet just have the chain on the big
ring atm, fd will take some sorting and It might need a new cable asp. And am quite happy that the chain is long enough, rd jockey wheel roughly at 5 o'clock so that's a win to me! Tho the tiny 30t IR might prove to be a pita!
Although I've not had much time to fully experience and test her out yet, just a few quick 1ml trips to the gym
and back. I'm surprised how just 4 extra teeth can make so much difference to the gearing, bike feels and rides
so much different, very smooth and positive with new bb too. Don't think I'll be anywhere close to spinning out
on this set up, hell, might not even see the 12t in action ever again lol