Hi
My stf8300 is 17mm including threads, the sx7 is 25mm +2 for threads and TS9oag is 9 +2
So 17+27+11=55
I use the mpccmk3 and the m48 thread. So distance required is 58 I think. But this combo works well with round stars in an f4
SX USB wheel
http://www.sxccd.com/images/products..._side_view.jpg
Cheers
Alistair