I have a Axial .28 Spec 1 with about 4 gallons of nitro through it. I can't get it to start at all. Took the engine out and noticed that I can turn the piston up and down without the flywheel even with the glow plug still in it. Took the out piston and sleeve to inspect it. Didn't see any scratches. I went to check the pinch of the p/s while out and the piston would get stuck at 1/8 from the very top of the sleeve. Is this still good or do I need to send it in for resizing.