It just sounds like what I have been seeing, to shiny and it creates over/under hell if you don't release it exactly the same each time. Not super forgiving IMO, but when you have the right matchup for it, it seems to really go through the pins with a ton of energy. The 500/4000 idea may just work for you, I took mine to 3000 + a light polish because mine was just to early for my house shot. And then I got my hands on web tour, youza....the GB3 doesn't even come out of the bag much anymore