Testing that shigeno tune now..will edit soon and let you know how I go. I'm quite excited...I've been tuning this car for a while and never quite got it perfect, and your tune is very similar to mine.
*EDIT*
Alright, after a few laps on autumn ring and tsukuba, the car handles ok, for it's weight you'd expect it to handle a little better, but the whole time I felt like I was drifting something a lot heavier than what it was. I also found it really hard to break traction with the high rpm turbo so I opted for mid range turbo and then left the gear ratios the same and wound the top speed back up to 167mph and adjusted the rear camber to 1.7. Everything else was left the same.
After that it was quite a bit of fun, got some really good angles and it maintained drifts nicely, but was still just too inconsistent to drive. Sections I would drift cleanly the first lap, on the next lap I would spin or under steer my way straight off the track. I think this car has a lot of potential, just needs constant fine tuning to find a balance that you're happy with.