Same objection here, serious difficulty locating secured rod ends at identical center-to-center dimensions with minimal equipment. Overhang of undersized linear bearing rods (I'll bet 2 vertical, then horizontal tried first), the swivel hasn't a substantial center bearing, or cleared relief (underneath table). Plywood is pretty flat, but not machine flat. Using only 1 of the 2 De-Sta-Co lever clamps is sure to jack the free side up, with cut out of plumb.

On the other hand, available proper facilities and resources are a huge issue for many craftspeople. As a prototype/ working model, not horrendous.