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
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.