It used to slip on boost at high revs, usually when around 70mph, then slip coming onto boost if I was overtaking etc.

I done around 5 standing quarter miles a few weeks back, almost hoping the clutch would go, so I'd have to sort it.
I didn't notice it slipping when doing the quarter miles, but thats because it was so loud, and I was concentrating (tongue out and all).

Have thse launch's sorted it? because I haven't noticed it since.

Also, if it is still slipping, would it affect a re-map, or will the mapper not be able to get the maximum power because of it?