Wow, thanks everyone, this IS valuable information for me to consider. I know it’s all physics in the end, or is it geometry? Anyway, I am the kind of guy who might just a make another way of adjusting on the fly with this uni-pivot arm. You see, on the bottom of the pillar that supports the arm, there is access to raise or lower the pillar. It will take some ingenuity, but perhaps a very small hydraulic jack or screw jack of sorts is the answer. Once adjusted and the pillar tightened in place the jack would be removed. The device that the SOL has to adjust VTA with does not hold the arm in place >(it is aplastic gear that is now stripped or something. Came that way)<, and I am not in the mood to pack it up and send it off for a long repair time.
I would like to add the following: Just the other day, I switched from a cork mat to an acrylic mat. Yes, it is thinner. The unexpected change in sound occurred. Actually, for the better. Gives me an idea of where to go from here.