I got myself a Reality Check, and it is a really unique ball. It seems sensitive to changes in axis tilt/rotation. It sees the friction, no matter where on the lane, and then turns over. I can safely say it is less ball than a Reality and about the same as my Track Stealth, just a very different shape.
Either way, I will be trying some surface on it - something like 500, 1000, 3000. I think the 4k fast makes the hook phase way too short. Updates to follow!