Since we have crossed the space-time continuum into a new year, I will continue this here:
it might also help if the two outside clamps bottom legs could hook in the same hole in the middle where the center clamp is
It does need to move over
The holes were just randomly put there as a generic clamping point. Since it is obvious the outer holes will need to be much closer to the center for most risers I will drill a set of closer spaced holes in the other end of the center support and make the middle hole larger to fit 3 clamps in if I need to. That will give me two sets of options for clamping up risers and lams.
No pictures yet today, I am just about to head out to the workshop to get started on things.
Mark