I have the G75 .....actually 4 of them. I have one in my H9 P47, I also have one for my TF P47 and AT6 Kits and a spare. A couple of the guys at our field have the ST90's and have absolutely no problems. I have a 90 as well so I'm well invested in the ST line. I have heard a lot of good things about them so would not be afraid to use yours.

Hope that helps,
Cheers,
Andy