Hello GeekHack
I am Des , fan of Electrostatic capacity keyboards. I used Realforce 87u and Leopold 980C very often . But I found the plate under the keycaps is really easy to rust . it is nasty and bother my mood when typing on it
Now I got a solution ,and plese see the pictures below .





As you can see from the picture I got solution for replace keycaps with MX slide as well. Please let me know if you like , and tell me what keyboards you are using and rusted , and I will offer solution plate for all topre keyboards .
The prototype is not perfect. but all screws exactly match , only some flaw mark which will easily solved in next producing. and balanced big keys are very nice .
I am Des_KB , welcome to follow . Regards .