I did the Nelson Racing modification on my 135i DCT setup. It was straight forward. There is plastic adapter they sell with the kit or you can just buy the adapters by themselves. I got the larger anodized black paddles with the adapter. The only gripe I have about the adapter is that there's a bit of slop where the is some free play. But that's just me being nit picky. I made a thread about this mod with pics. I'll see if I can find it.
ETA: Found it.
https://www.1addicts.com/forums/show...=nelson+racing