Damn, Chris, you really have had bad luck with instruments. . . I also experienced the same problem with the G string falling off the fretboard. It was really annoying, but it looks like it was worse in that "Family Reserve" of yours because they probably polished the ends more than production basses. And not to derail this topic more, but yes, those guys at EB/MM, starting with Sterling, are a sack of poopooheads.
I can probably write an essay about lefty 5-strings, but these are the ones I've owned, in purchasing order:
-Warwick Thumb Bass blot-on: amazing sound, tight, bright and modern, piano-like, aggressive, but very heavy and difficult to play. Thick neck.
-Yamaha TRB-5: pseudo-Jazz-bass sound, thick neck but more playable than the Warwick. 35" didn't feel that long. Not too heavy, but not light either. I great bass to have in general for the money. Great fretwork and quality, usually.
-StingRay 5: I've had many, as I explained below. Still a great bass is you don't mind the flaws and find a light one. Recommended for funk and rock, but not Latin, reggae or Motown.
-MTD 535: one of the kings of the jungle. Mammoth sound, clear, punchy, big, articulate. The neck was chunky and that paired with the 35" scale made a chore to play, for my small hands, at least.
-Kinal: beautifully made boutique luthier. Only had it for a few days because the neck needed shimming, but I was too young to know, so I sent it back.
-Ken Smith BSR bolt-on: king of playability. The best 5-string neck, ever. Muddy sound. No body contours means it's not the most comfortable bass (I like Fender-type contours). Ken Smith is a character. You either love him or hate him. I didn't like him much, but I recognizer his a master builder.
-Lakland 55-94: one of my all-time favorites. Top-notch in every way. Mine was from the heyday of the company. Beautiful woods, craftsmanship. . . everything. But the 35" scale and wide neck was too much for me.
-Sadowsky 5-24: I've had three of these guys, One of my all-time favorite.
-Ibanez SR1205: incredible value for the money. Excellent everything. Light, balanced, beautiful fretwork (as good as any $5000 bass, no kidding).
-Carvin SB5000: Great value and quality, but the sound and feel never won me completely over to keep it.