Looking to pick up a 394xp for fairly cheap. Starts up and runs, piston looks pretty good...Not a saw I would use much but need a big saw every once in a while. Are they worth it if I can get a good deal, even if I need some rebuild on it? Just bite it and get a 395? What's a good compression on these? All saws need to be around 150 to be considered good? Looking it up online says I can run a 42" bar on it which would be plenty. Not a big fan of the front chain adjuster but......thank you. What about parts, still fairly easy to get.