So after playing bass a few times for a mate's band (initially only did a few dep shows) its getting to a stage where I'm getting to play more often. I use the original guy's bass, an Epiphone Firebird, which is tuned to B E A G (it should be B E A D, I know but as he normally uses a 5 string he's tuned the thinnest string to a G as he uses some notes on a song that wouldn't be possible to reach if it was a D). They play in drop b but the bass isn't set up for a drop tuning.
I been thinking of getting my own one as its a bit confusing transposing from guitar (I sometimes fill in on guitar) and some of the riffs have to be played 2 frets down. Also I'm not in Motley Crue so the bass looks a bit weird in a metalcore band!
How would I set the guitar up for a drop tuning? I don't think bass strings are as popular as a custom drop tuned gauge, and should I go for a 4 or a 5 string?