I have been putting more work into the baseboard supports this weekend.
Rather than to go for adjustable feet, I have elected to make the junction between the beams and the trestles adjustable. This was formed fairly simply by utilising a pair of bolts that are permanently secured to the trestles and then clamp a plate between a pair of nuts. This plate will then be fixed to the underside of the beams.
Simple enough idea, but I went for M10 bolts because I wanted to be sure they did not get bent or broken as these components are moved around. This meant that there was a lot of drilling and cutting to do – so much so that I broke three drills (two of which were 10mm so fairly chunky) and melted my Black & Decker! Not quite such a cheap solution as I had in mind but this is what was created: