According to my records, my first 5 string was completed in November 1989 (#663). I was a bit late coming to the 5 string party and it took me a year or two to settle on my current specs for neck width, nut width and string spacing.
Well worth the wait for those specs! Only Ibanez BTB, some Fenders and the wide Carvins can come close to your spec(I'm only speaking for the neck width and string-to-string spacing), but those other brands are just too heavy.
I'm also a huge fan of the Modern 5 basses! Gotta order another one sometime this year!