I've been reading up on GB as I placed an order for a Premium, and ordered Cliffy's shooter lane protectors after my GoT got a little shooter lane wear even with just mylar alone. This seems like a design flaw -- the ball comes out of the trough hard and at an angle that bashes it right into the groove of the lane (on my GoT, I'm assuming the same on GB). I would think either ejecting softer, or hitting the black rail (easy to protect, letting the ball 'fall' into the lane) would be less damaging given the surface area -- seems inevitable after carefully watching the way the ball ejects that the clear will chip/wear in the lane where the ball lands.
For those who've installed Cliffy protects and specifically the one that goes under the black side rail to protect the far edge of the lane, any pics of how you've stalled it? I know you have to unscrew the rail from the playfield, but seems like you'd want the metal edge of the protector to be right along the edge of lane groove to protect it.