I have the Powerbronze screen and it has held up well. The rubber grommets did go bad after a couple of years but Powerbronze replaced them at no charge. The worst part of the screen, in my opinion is that it is hard to clean. Lots of cracks and crevices. It flexes around a bit at high speed but had it to 140 mph with no problem.
On mine it flexes at high speed like yours and I think, "At this speed the windshield is flexed down pointing at my neck. if it lets go it won't be an open casket." I still have my original Powerbronze mid-size for 2 years and I'm okay with it. It works well/decent/not bad/okay for it's size and it doesn't take away from the aesthetics of the GT. Cheers.
Had mine on since 2020 and with 59,000 miles it is still holding up.
Get a grower and not a show-er.
I too have the Powerbronze Powerblade. It comes with two different heights of the top shield. I tried the short one and it didn't provide much wind protection at all. The taller one is better but still lot of wind about nose up on me at 6'2 . The supplied hardware is junk and prone to loosening up without over tightening. I got some black fasteners with the nylock inserts to stop that. Also after a while the nylon spacers between the bottom shield and cowl start crushing from the forces applied. They sit at a slight angle to the cowl and windshield so the edges of the spacers bear the load distorting them over time. I'll replace those with larger diameter spacers the next time I have it off.
