Happy ending! You're far more likely to smoke a tube and or socket in that kind of mismatch scenario. I've repaired many, many tube amps and have replaced all of 2 blown output transformers. Def best to match the load but I'm not quite sure how the internet made us guitarists have such a paranoia of blowing ot's. Glad your amp is a-okay.thanks for the advice. I reloaded the fuse and put some new power tubes in and she works great. I think it was a 6L6 that gave up the ghost.
Now I can blow some shit up again. Loud amps moving gobs of air are what it's all about.