The barrel is .689 and the paint .680 so definitely some overboring going on. It's never been an issue for hooked shots though as far as I can tell from shooting other open bolt electros at lower pressures. Somehow I feel like the high pressure along with the fairly violent action contribute to some of that but who knows, I have been wrong (many times) before.
I'll start out with a spring kit and reg and see how that goes. These guns are insanely under rated. I had just as much fun with the spyder as I did with my autococker and the spyder seems to balance better with a tank and hopper.