What switches and which plate? Those vbs up there sit nice and tight inside the cutouts.
Brass plate, I tried every switch I had, new Cherry, vintage Cherry, Panda, Gateron with black bottom and and Zealios.
Quick and dirty video, the ones that were still in afterwards would fall out when you just touched them:
Measuring the cutouts told me that they are 0.4mm larger than the ones on the TX-87