Hi John-
I mounted each press to a piece of plywood that has a mounting hole at each side. there are four pieces of threaded rod stuck into t-nuts and equally spaced across the bench that line up with the holes. To mount a tool, you thread the rod into the t-nuts, slip the plywood base over the rods and fasten them down with threaded knobs. It works pretty well. By putting four rods evenly spaced across the bench I can one tool in either left, center or right position or two tools, one left and one right as shown in the picture. The only little problem is that if you don't hit the hole exactly when you set the base on the bench, it knocks the t-nut out and the bolt and nut fall through. Nothing that a screw next to the t-nut to hold it in place wouldn't cure.
Sorry it took so long to get back to you about this, but I just noticed your question.
Happy Hunting,
Marty