Ok, I just checked again. There's a train track down the hill I go over at 5 - 10 mph and in 2nd gear. I accelerate out from about 1K - 2K rpm -- no problem, just as smooth as ever. Other than this I rarely run slower than 2K rpm. So it sounds to me like this "jolt" that some of you seem to have is not normal.
I've been assimilated. 6MT/ZPP/18"/PS extended.