Mine doesn't hit the mount, but I do get a fair amount of rejected shots off my ramp up near that first bend. If it goes far enough up, you can bet you're either going to lose a tilt warning or drain it STDM if you're not fast enough.

I've never seen it hit the mounting plastic though...it shouldn't be catching any air on that ramp, and the plastic should sit on top of both sides of the ramp AFAIK.

When you say left ramp, you mean the blue light cycle right? If so, the ball catches air and rubs the bottom of that plastic all the time on mine. I covered the underside of the plastic with mylar to prevent loss or artwork, but there's always a dirty line on the bottom side of it. No rejections, though.

Mine kind of spun around in there and would kick back when I first got my Tron. I waxed the at field and ramp and it has not happened since. I have no idea why.

I have same issue. It's because of the shape.