Here is a thread where I details my stand and t-track:
The method I use for clamping (some fender washers, a flat-head screw) will provide a very low-profile method to clamp your material.
Works best w/ t-track but can be used w/ threaded inserts so long as you’re flexible with your workpiece dimensions (the workpiece should end as close to the edge of your threaded insert as possible).