Hi. Just finished tuning my tracker. Polished bearing surfaces on piston. Fine emery and polish to cylinder walls. Rear spring damper had crumbled and was everywhere inside, so flushed and cleaned. Removed old seal, but when I put new one on, the piston would just drop into the cylinder under its own weight! So I cleaned and lightly polished the old one. Which by the way was conical , and not parallel sided like the new one? When I chronograph tested, I had managed to LOOSE 60fps with most pellets?! I am worried that I have removed too much metal from the cylinder walls or material from the old washer. Are there any slightly over size seals available (tx200?) That easily fit on? Thanks.