Bajo Sexto/Quinto conversions?

Has anyone here ever converted one to a fifths tuned instrument of some sort? Here in Texas I occasionally come across affordable ones, seems like with the proper string tension calculations you might be able to come up with some sort of interesting mandobass/mandocello hybrid. I guess getting one and tuning it DADGAD might be a start. CGDAEB I guess would be the goal to shoot for. I seem to recall someone here converting a 12 string guitar to a fifths tuned instrument, I guess that would be somewhat similar.