I have a 1970s fretless Ventura violin bass guitar. I got it cheap, but am starting to realize why that might have been. The pots are extremely dirty and need to be replaced. A few of the screws on the pickups are stripped. The bridge is too high and i can’t lower it. The tuning pegs are rusty and the truss rod is stripped bare. I used to look at this bass with fondess, considering it was my first. I’m now considering selling it and upgradin. Should I upgrade or dump a bunch of money into this gem?