I don't know if its the same place; like you, I flew in based on posted website pictures and their report of work done and found my X5 to be exactly as advertised, with all needed repairs done to get it in top condition. I toured their facility and a separate storage building where they had a couple of beautiful E28 Ms, among others. If I were in the market for a properly prepared M, I would check them out. Just north of Cincy, near where its northern interstate bypass meets I-75.

As for the SSK - do look at Green Dragon's posts, maybe PM him, as he has done recent mods beyond a UUC SSK install, and can best address your questions.

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2006 X5 3.0 6-spd w/Evo UUC ssk
sport/premium pkgs
born Valentine's Day, 2006.