3/4" Pipe Clamp Feet
Clip on feet - 2" long to be a little taller than my Bessey clamps (that have feet but are inconsistent) to support the ends and middle of the pipe for heavy glue-ups.
I use the standoffs on the top (to support the boards and keep glue off the pipes) and the feet on the bottom to keep the glue-up perfectly straight. If you overtighten the clamp, you can see the feet in the middle start to lift off the workbench.