Winter, I would say that those numbers are a fairly accurate analogy of our findings. We would ocassionally find blocks that contradicted our previous findings, and while we did sonic check a large number of 250 and 292 blocks, that number still represented a tiny segment of blocks still out there. There might be a large majority of blocks still available that don't even meet the minimum thickness of blocks we measured, or even could exceed our earlier findings. But we always tried to make a Mexican block our first choice for a race block, I can't say I ever remember one of them being thin in the cylinders.
