Any 4 string bass within reason can work with Drop C tuning, I've done it on my ACG and on my Fender. The trick is to find the right strings. If you give the guys at [url="http://www.newtonestrings.com/"]Newtone[/url] a shout then they'll sort you out
[quote name='bluejay' timestamp='1347390315' post='1800205']
Hang on, do I get this correctly, a 4 string bass that's tuned... how? Low C on what used to be the open E string, and what are the other open strings tuned to?
[/quote]
CGCF
FWIW I have tried playing the Cerberus Cell tracks on my 6er but as my guitarist writes the songs in Drop C I would be holding down the first fret of the B string an awful lot and sacrificing a lot of speed in the process... (not something I can afford to do, I'm just not good enough for that )