Hmmm...7's are very popular these days with the rock types into Korn and such like. I've played a couple and they're pretty cool. There has been an acoustic 7 for sale in the local shop and it would be better if it had a decent sound, but it's a rebuilt 6 and the body lacks the low end clarity needed for the low string.

There are a variety of ways of tuning these things, even when it's essentially standard tuning. One is to tune the low string to B with the higher 6 tuned at standard pitches, another is to make the 7th string a higher string and tune it to an interval above the high E, another is to tune the lowest 6 strings to standard tuning intervals but starting with A or B or thereabouts and pitch the high string wherever you like.

I thought about these things when I got my 6 string baritone with which I am really and truly in love. I'd seriously like a good 7 string but I've got an equally serious cash-flow problem at the moment.

Many jazz archtop players have been using 7's for decades and it's a wonder they're not seen more often in the altered tuning universe of folk music.

Various kit guitar suppliers will sell you electric 7 string component parts of quality, but acoustic flat-tops of equivalent value seem to be the domain of individual luthiers as of yet.

I humbly submit that if anyone would act as kind benefactor, I would gladly acquire a new acoustic (steel or nylon) 7 string and report back to Mudcatville about it later.

Experiencing GAS pains...Mooh.