[Mgx3d] has done that by designing 3D printable bar clamp jaws with a quick release mechanism that can be used with standard T-slot aluminum extrusion. This allows you to create ad-hoc bar clamps ...

Clamps like these allow you to keep your wood pieces securely in place for glue-ups, brad nailing, or pilot holes, while preventing unsightly dents or blemishes.

I hung the bar clamps off the top of the 1×4, and the spring clamps on the bottom. This immediately made finding clamps quick ...