Just been looking myself & found these guys at Sheffield CC Motor Sales, Unit 4 Dannemora Drive, Sheffield, South Yorkshire, S9 5DF - Telephone: 0114 332 0154
Yes I know BTR Prep closed as I was looking at taking mine there. The guy lives near our Mr Norton. I'll look into them as I have a problem with the geometry & cant get all the wheels aligned properly due to the coilovers. Even with a hunter machine unless you have the correct numbers to input into the machine it can be a guessing game so im told
Not a pro on the how they do it. But I'm sure they will be more than helpful.
But I know track torque have the some 3D set up machine, or something. Plus the guy that did my mates scoob talked him through how he would set it up and why.
When I went to BTR, (mine corners great, and holds the road ace) they dropped me off at Xscape and picked me up when they finished. Took the money and handed me the keys. A good but different service.