I need to lift my XXL, firstly to slip in some foamboard, but also to move it to a new bench someday, and ALSO to store it up near the rafters while I use that precious 16 SqFt as an assembly table.
So if you are going to lift it up when not working in use why not build a torsion box. You can secure Shapeoko to torsion box and lift torsion box. The torsion box will keep machine level and stable.