Guys, I bought this "project saw" super cheap at a G-sale. It's a like new Stihl 026 PRO. Someone started with a top end rebuild and quit in the middle of the project. I don't think there's a single problem with the top end. However I did find that the impulse hose was not connected. I'm trying to decide on which piston to use. On the left is the original Stihl piston with extremely light scoring on the exhaust side. I can't even detect the scoring with my finger nail. On the left is an new unbranded aftermarket piston. I'm kind of leaning towards re-using the OEM piston despite the extremely light scoring. The cylinder looks perfect as does the intake side of the original piston. What say you??? TIA.