Thanks for the ideas. Would like to take it down/clean/lube as it's pretty gummed up and bit corroded inside. Plus, it's an old side-button model which I understand tend to wear/break with use; all the better to clean/lube it properly. The action lever release is a wobbly goblin right now; ordered new wear parts thru Numrich, so whatever I run into should be fixable. It's a point of pride that I present it in excellent working order by my own hands.
Craigster - that dang book... you're going to cost me a Kindle just to download/get it, aren't you?