Having thought a bit more about @Xnit comment, and searching around a bit more, I’m now looking at a heavier-duty bench, specifically:
The only issue is that this is only 36" wide (with the GF spec’ed at 38"). But as it has no lip, and the previously posted pictures of the bottom of the GF show the feet-pads not going all the way out to the outer edge, I’m hoping this would work ok.
BTW, if the reviews are to be believed, the bench above weights > 250lb (see post below for actual weight) - so I would expect that would absorb any movement of the GF (even given the cart is on casters).
Any of y’all who currently have your GF have any thoughts on 24 x 36" tables? They work ok for you?
P.S: for anyone else searching around to table/bench ideas there are a number of past threads on it, such as: