I have also converted a SG shaft engine into a TG10R.
I use Kawahara small diameter flywheel a Mugen centax clutch front stopper and some shims that all. Clutchbell and shoes are original.
Well, Last year a TG10R did take part in a race at Johor Jaya TCSS race.
It did quite well, A main 2nd or 3rd, cant remember.
Thats were over 10 snakes there too but unfontunately the best driver could only make it to B main.