Yeah, no go on that score, sadly.
Understood but I'm not entirely skill-less when it comes to fettling guitars and basses. I've been doing my own set-ups and maintenance since the early 80s. I've 25 basses in total (and six guitars) and maintain all of them myself. I'll have a go at the penetrating oil job. mentioned above, and if that fails I'll get it to my friendly, neighbourhood, proper geezer bloke luthier.