So I took some test shots yesterday and managed to get them developed last night and hung them to dry before bedtime. After random errands this morning, finally got around to scanning them in. In my hurry yesterday, I messed the shots up in various ways, mostly in exposure, but I found other, more eclectic, ways to screw them up as well. Regardless, despite everything, I find them encouraging -- if the contrast and sharpness are a bit improved on poorly-exposed, potentially slightly out-of-focus shots, then I might be on the way. Once I set up a re-usable focus calibration station (light, good target, board with small cleat to hold the camera in one spot) I'll check the focus again. In the meanwhile, I think it's usable, so I'm going to run another roll through it, this time hopefully with better technique.
Next time I have some excuse to pull the hood, I'll look around for a possibly-missed set screw, Glenn, thanks for the tip.
Here are a couple shots from the I-get-in-too-big-a-hurry roll:
A snowy shot for Larry:

My daughter who was having a hard time sitting still long enough for such low light (we'll ignore the fact that I exposed for the windows by accident and had to pull up the exposure considerably in post):

The miter vise I had been using to test the focus in my messy shop. Oh, and the edge of the stupid board the camera was sitting on -- I'd moved it back for uninteresting reasons and was so focused on the target (see what I did there?) I managed to ignore the fact that most of the frame was filled with a lot of nothing:

Still, I think I'm on the right track and this old guy will end up being a decent user again.
Aside from locking down the focus, the other thing that could use some tweaking is the film advance. It sounds like the gears might be a tad stripped out in a couple places, and sometimes it slips a bit, so the film doesn't quite advance enough to get good spacing between the frames, even to the point of overlapping a little sometimes. Pretty wary of digging into that part of the camera, though, as I suspect the opportunities to screw it up are even greater there, in addition to being less amenable to repair without some replacement parts. But you never know, I might get wild and impulsive again...
Anyhow, thanks again for everyone's suggestions and help, it is much appreciated.
Robert