I happened upon a nice unaltered B2 racer kit car a while back. Ran it with 10.5 and I really like how the car handles. I've since shelved it (spares are a bit scarce) and this past fall bought a B3 sport car off ebay. I've completely rebuilt the B3, replacing the bushings with bearings, etc. but I haven't yet had a chance to run it. Looking forward to some track time in the near future. I think the B2/3 cars might be a little underappreciated. Box-stock, my B2 is quicker than any of my older tub or graphite RC10's. I reckon that's as it should be.