I believe the SXX TC spec, and SXX stock spec are the same hardware wise, but different software. I'm currently looking into a way of transferring the software over... It is feasible, just will take a bit of mucking around.

I've been LRP all along, and will probably stay that way, but I must say that there is a lot of argument in switching to the Tekin. Not because it is faster (because I think that entirely depends on the track / driver style) but because of how much cheaper it is. RS Pro are around $250 to buy in Aus. LRP are around $450. Then there is software updates..

Funnily enough though, they are almost the same price ($210 RS Pro - $230 SXX SS) overseas.. just a couple of dollars different....