I'm curious to see how this turns out. Also how much work is involved.
So I just did the mod (swapped the metal plate from a stock silenced board and installed it onto a stock not silenced board). It worked flawlessly. Total time spent was about 30 minutes.
Steps involved:1) Remove cases from both keyboards.
2) Unhook the usb cables from the PCBs on both boards.
3) Flip the boards over so the plungers are on resting on your desk/table/worksurface.
4) Unscrew the PCB from the plate.
5) Flip PCB over so plungers are on top.
6) Lift plate away from PCB.
7) Swap the plates/place plates on top of PCBs (note: PCBs will still have the rubber domes installed...we are only swapping the metal plates with this mod).

Flip boards over (plungers on your worksurface) and screw the plates back into the PCB.
9) Reinstall usb cables.
10) Reinstall the cases on the keyboard.
11) Enjoy newly silenced realforce keyboard.