thanks elie - it's R&R who are repairing the diff and suggested the Quaife wasn't that good for drifting and donuts, but I think is all they can supply for the Ital - will give Jigsaw a call tomorrow if I get a chance, but not sure I can run to the £816+ they list for an LSD on their site - Oliver, I'll post up if I find any other options. I've driven a DD car with the early Sierra diff and it did noticeably (under, mostly) steer the car, and would like to avoid the sudden and unexpected sideways in the wet moments that car was keen to dish out, so it's likely the ATB is the best compromise.