OK, I've had my Mosrite Celebrity bass for several months now. I took it totally apart to clean and repair some age induced issues (broken pup wire, ill-fitting neck joint, nick down to the wood, truss rod issues, etc). I've spent a lot of time with this bass and have come to several conclusions.
1. They are very unique in their styling, not trying to copy any of the other guitar makers of the time.
2. The construction was very good, but not as good as Fender or Gibson.
3. The pickups on this bass are as unremarkable as Dave and Scott said they were.
4. I've spent hours on it and it just sounds like crap and doesn't even play all that well.
5. It's toast, I'm parting it out to buy some power tools!
End of my Mosrite saga. I'll stick to Gibsons and Guilds. They really knew how to build hollow body instruments.