Rich is correct. R-tech are no longer sponsers of the forum, thus the dedicated r-tech section has been removed. However, the old remapping section is still there and still has 10pages plus of useful topics, from R-tech and other contributors.
I'm sure R-tech will still pop in every so often, and the whole forum thanks them for their contribution whilst they were sponsors.
Otherwise a recently added sponsor in the form of Carbon Chip Tuning will no doubt give you equally as informed answers if you direct their attention to a topic you require an answer for.