Thanks for the good ideas ladies. I knew a few of them and learned of a few new ones. The only one that was sort of alluded to, that I knew, is if you are disassembling something (possibly the bobbin area) to deep clean, take a picture before you start and before you lift out each piece so on the return trip you have a pic of how it is supposed to look. That's got to be an invaluable one - ask me how I know! Situation that birthed this thread.