Latest tragic upgrade I had was today while working on an 029 Super. I stumbled upon flaws in the case where the ignition module fastens. It was so bad that the mounting screws would not hold the gap setting. Then I was unable to remove the clutch because of over tightening and rust. Looks like the bearings were also shot along with the crank seals.
This saw was likely 22 years old, and I decided that many of the parts were worth saving, so it made it to my boneyard. Seldom do I give up, but his one forced my hand. You win some and you lose some. My rule of thumb is to do the take down first before ordering new parts.