I had Alpine build me a turbo rx1 7 years ago and not one problem. I would not hesitate to have them build me another one. Dean and Julian are awesome people.
I'm the guy that sold it to DDrake and the 2" fit with no problem. The track that is on his sled has the notches for the coolers that's it. Not sure if u have to have that style or not. It's just what I had available