When I jumped to 5 string, I kept wishing someone made a set of strings where the B string was a different color. It would have made retraining the brain much much easier. Once you get over that low string not being the E string, the five actually becomes easier to play than a 4. A lot of position shifts can be eliminated.
Carvin had a BB75 (Bunny Brunnel) model 5 string with an asymmetrical neck so that it felt more like a 4 string and the dots on the fretboard were lined up/centered with the EADG strings. Never got to try one, but it seemed like a good idea.
