Marcos Maniacs

This weekends project is to work on the rebuild of all the front 1/4x28
keepnuts which hold the metal frame and motor mounts. They had all rusted to a point of not coming apart. I had to drill most of the heads off to remove all the parts for blasting and painting. 
I would like to ask others who have done this repair if they just replaced with the same keepnuts or if the made a change in design?

My concern is not the reassembly as that is straight forward, but since one of the bolts makes a ground point for the wiring that bolt may need to be removed from time to time to clean the contact or to add a wire. I know the nuts will rust once again and it will become difficult to remove the bolts should I need to do so.

I have purchase 1/4" stainless steel plate and am planning to make backing plates which will be screwed in place from the inside and then drilled and tapped for all the 1/4x28 screws. The stainless is non magnetic and should not rust. This assembly will provide a much better support as well, since the load is spread over all the area of the plate. I would also use stainless bolts with antisieze compound.

Thoughts or comments please.

Mark