My local track is a mix of concrete, loose dirt and some sections with carpet.
Astro, what kind of surface is that? Have heard it before, but never got an explanation...
But I think I just have to get a Rb5, now that you says it works as good as a B4
I have been reading in the Rb5 thread at RcTech now the couple of last days, but I still got like 80 pages to read