Ah, I see. I thought there were only the ribs that extended to far down and thus hit the housing. Those could easily be removed. I see the problem you mentioned now, that will be much harder to fix.
Probably going to check them out. I am visiting them now, unfortunately I don't have any keycap to compare it too, and don't have my cad files either. What is the normal diameter of the cylinder in which a normal MX socket is located in a keycap?