Kevin, I don't rally have any news that you are looking for, just a comment or two. Your unit is pushing 30 years old so you are certainly in the correct profession to help handle what comes up. This was a quality unit when it was new, probably had not much of an owner's manual then and there certainly is none right now. Shoot, where isn't much of a manual for a new Holiday Rambler anything.
Your best bet is to join a couple forums similar to this one. Don't worry that you don't have the brand they talk about. Most of these units are built with the same or similar parts.
Ask away about any situation you may have. There is a lot of experience on this site.
And, welcome to the forum.
Jim and DW 49 years Brenda
2017 38rssa, also a 2015 Salem (for Alaska)
2019 F450, ruby red
Harley Road King & sidecar