Just connected up the thumbie for the rear derailleur and oh my word how smooth is that shifting??? Seriously, no bother at all on the ten speed (I'd read people saying, ooh you have to be really precise, but so so so so easy).
Only issue is I took the front derailleur off, just figuring to run the middle ring (5 hole rings compared to 3 on the single chainring I bought) and the natural chainline is sitting on the small ring. Feels great though. Connect up the brakes at the weekend (out all tomorrow), hopefully the wee front rack will arrive, get a new rear 'guard, and the Kaff is back in business....