[Oldmanandhistoy]

You mean 90° counter clockwise? Then I'd have to mount it to the table top (or flush to it) instead of the edge. No welding, no steel, aluminum only. No room for more tools.

Yes counter clock wise.

If you were to use steel and have some one track weld L plates for you then you could increase the gap between the vertical bearings. This would then allow you to increase the height of the rail so it would have a larger contact area with the side of the table.

Also which is probably very obvious to you; you could use the same system for your Y axis fixing rails to a torsion box beam.

Imho you would end up with a very ridged system.

John