Stryfe Rev Switch Drop-In Update. No Cuts.

Conceptually inspired from the original design and I had to put some changes to keep the original rev trigger.
It works with 5A switches.
The Switch block is friction fit, so if you are not sure it should be there, widen the hole a bit, so it will be easier to remove it.
The pusher is free, so it might have some rattle.

The parts might need some filing to smooth the contact surface.
The screws are plastic tap 2.6mm with length of 12mm to 16mm. 10mm and 18mm with blunt tip may work as well.
You may tap the holes with M2.5, if you like to use machine screws.
Don't over tighten the screws, so the switch can operate freely. Its spring is the only trigger return mechanism.