It's been suggested in this thread Open tuning [what is it] that this thread should mention this ... Polite suggestions what to do with it (tuning wise) should perhaps be mentioned there or perhaps in The Ultimate Busking Tool...

I have a weird gagdet - a guitar neck bolted to an enamelled steel hospital bedpan. It sounds very tinny - lacking in bass because of limited volume and inefficient loading to air because of insufficient constriction of air (no soundholes as such) - it's quite open - as you may well it should be for its original purpose!, and I have been advised to try setting it up in nashville...

Robin