I know of "Nashville Tuning" - even though I don't play the guitar (yet)!

Is there any recommended "open tuning" that is like Nashville, or should one just move the strings around in the "Nashville" style Tuning?

I ask because 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...

But I would really prefer an open tuning...

Robin