Probably best to post this here!
I'm primarily a bass player and my main bass is a 7 string from Sei Bass in London
www.seibass.com
This pic was taken for the "Basses on the sofa" thread on the UK bass forum Basschat,co.uk
L-R:
Conklin GT7 (which has been converted to fretless),
Jackson 'Kip Winger' (my old faithful bass from the early 90's!).
AC Guitars Recurve Singlecut 9 string (built in Moffat, Scotland
www.acguitars.co.uk).
Sei Offset Flamboyant 7 string (my main bass, hence my username!)
James Tyler 4 string
I get asked why 7 strings and it was a gradual move over a lot of years! I started playing 4 strings and then went to a fretless 6 which I played exclusively for a few years. From there I got the Conklin 7 off of eBay and stayed there. The 9 is a small leap from there. The 7 and 9 are all strung in 4ths which does make getting around a lot easier than it seems. The necks seem huge, but they're pretty straightforward to play.