If I were in your shoes I think I'd run the car in properly then get REVO to send a low boost file that's less aggressive if it were 'free'.
If you still get issues then as others have suggested here, a DTUK box would be a good investmemt. The power comes in on the tuning box far more like a factory map unless you go a bit bonkers with the settings.
And you will have no traction issues with an R!