I've torn down a few myself always had leftover parts. I usually find out what it was months later, if at all. Most of the time it's just some extraneous reta

I've torn down a few myself always had leftover parts. I usually find out what it was months later, if at all. Most of the time it's just some extraneous retaining bolt. One time it was a vacuum hose(those are the worst). Plugged it with a bolt and it ran fine til I sold it. Last time though, I used tape and labeled every single hose, wire, screw, etc. Unsurprisingly, there were no extra parts afterall :).