In the hands of TB, the V4 SF was a lot closer to the V4R in the hands of a plank but the plank on the V4R was only about 0.25s off TB’s V4R time. So what did we learn ? The V4R is quicker than the V4 SF, which is a bit of a no brainer and (almost anyone) can ride the V4R quickly in a straight line. Meh. Andy