I hadn't realized that it has been 5 yrs since the last update...
I went through the Ron Sutton experience, and was well invested before I learned of the debacle that resulted with other folks. I continued down the path, and ended up relocating the upper and lower control arms, added ATS uprights, Wilwood Aero6 brakes, Forgeline wheels with r888r's, and lots of tuning.
Ron took a year to get back to me with all the specs, and eventually parts, and then the build process took a lot of back and forth and staying on top of him, but the end result is actually really, really good. I did a track day at the Ridge over in Shelton, WA, and the car really handles well.
It would have been a lot less painful, and probably less expensive to just get a complete subframe from Speedtech (I have their torque arm and it is fantastic).
Live and learn...
Next is some more weight shedding. The car is ~3250 with me and a full tank of gas in it. I'd like to get it down around 3000, so I'm looking into composite hood, trunk, Lexan rear window, removing inner fenders (perhaps composite fenders), and getting some weight out of the doors.
Photo is of my car, an instructor's GT3RS, and a buddy's awesome ramp truck