I sure will... I looked and looked for this to be done already and cannot find a thing in this direction. So a Tub Cello just might be a first. I can’t wait for the opportunity to have both the “sustain” of the bow and the pitch “bending” of that one string. Should be able to produce some very cool stuff. :)
There’s a guy on youtube who made a “3-string shovel.” Only way I can describe it! If you don’t mind youtube, check it out. Some folks are doing amazing music with ukeleles, too!