I didn't have that cool router, but here's my thread from a few months ago detailing the protector I made for my Alien Poker.
https://pinside.com/pinball/forum/topic/i-made-a-playfield-protector-self-evaulation
It does play nice.
As I point out in the thread, I only went down the "make" path because "buy" wasn't an option for the title. Recently I decided I like the game enough to get on the buy list for the reproduction playfield, so eventually the one I made will be retired. I've also got a protector in my Flash and it plays slow. I have one for my BoP but I haven't installed it yet (I've had it for over a year).
-Rob
-visit http://www.kahr.us to get my daughterboard that helps fix WPC pinball resets or my replacement LED display boards for model H & model S Skee Ball