Another small update: 

I've sorted out all the issues with this machine except the double-advancing Q and A keys (and very rarely Z and 2). To address that, I've tried moving the trip point in and out. I've tried opening and closing the gap between dogs in the escapement. I've tried pouring mineral spirits into the segment at those keys. No real changes (maybe a little tiny bit better, but that may be placebo effect / optimism).

I also tried moving the segment fulcrum pin so I could remove the type bars to clean directliy and polish them, but the pin does not budge. Even with a generous dose of Kroil, a pin punch, and a hammer. 

Does anyone have any tips on getting the fulcrum pin to move? 

For now, I'm going to just use it and hope that pounding away on it loosens stuff up as it did for Ted Munk in the post Dust linked to above. If that doesn't work, and I feel that the machine is worth the effort, I might strip it down again as much as possible, then try heating it up in the hopes that the segment will loosen its grip on the fulcrum pin (and, even that is in the hopes that getting the type bar out can have any effect).

It's a challenging machine because, otherwise, I really enjoy it. I love the type action, key feel, and typeface (a 13 CPI (yes thirteen) typeface that doesn't feel as small as the numbers). 

I also asked Paul at Bremerton Typewriter (formerly Bremerton Office Machines), but he couldn't think of anything that I hadn't already tried.