If you can't adjust the height for the thicker platter make a spacer. I had that problem with a Syrinx arm on a SOTA table. On SOTA tables the arm board is recessed and the Syrinx was not tall enough. It needed another 3/4 inch. I made a spacer out of plywood with a 2" hole saw. Worked fine.
I still have that arm and the spacer. Interesting arm the Morch. I like the bearing. People think it is a unipivot but it is more like 1/2 a 4 Point. You can even get arm wands of various effective masses and lengths.