Well I guess the sales rep at Bailey's took me for a ride, that is where I got the rings and crank seals. He should have mentioned or offered the after market kit, then I would have been in better shape as far as parts and money. I guess you live and learn the hard way. I will keep fooling around with this thing for a while and maybe stumble on the problem. What ever I find I will let you guys know. Thanks for the link, I don't know how you found it but thanks.
Whoa, I wouldn't be too quick to place blame here. When I order from Bailey's, I get exactly what I ask for, not something different. Most people who order from them know what they want. If you asked for an OEM piston or rings, then that's what you got. If you wanted aftermarket, then that what's you get. I don't believe that when you enter a Stihl part number, it automatically cross references the aftermarket stuff. Maybe Gregg (Grandedog) can shed some light here.
As far as your time, parts and money are concerned, you should have asked lots of questions here first, maybe posting some pics. Maybe you didn't need a new piston or rings. Maybe all that you needed was the correct compression tester with the Schrader valve? There is lots to be learned on this site, but you have to throw it out here first to get the experts advice. Maybe we could have helped you save money, not the Bailey's sales rep.
As far as your saw is concerned. Put a new spark plug in it, put a little fuel mix in the cylinder and try to fire it up again.
I am thinking your timing could be off from you filing the flywheel key. Not sure how critical that position really is. Do you have the correct gap between the flywheel and the coil? A business card (thickness) works well for that.
I know that you are now working with a service manual that I sent to "imanoob", good info and troubleshooting in there. The really good stuff comes from experience on this site. Don't be afraid to ask questions, and good luck.