Nube did mine as well, I wouldn't trust any other person on the belongs of my engine!
He is as said, very responsive and helps you with whatever problem might come along the way and there where a few on my way to my 6speed RS6 Avant. This winter I have to rebuild the engine again, do to oil pressure line failure along the line I will upgrade my fuel system to his requests and put in a wideband lambda.
cheers