Reggie--

Most bluegrass people are even more friendly than "Martin Gibson", hard as that might be to imagine.

A couple of possibilities:

With your washboard, I would think you could do any number of railroad songs--it would fit pretty well. In the groups I've played with, I'll tell you we would have liked it.

And the saw would be good on waltzes (of course your key would have to be good for other instrumentalists also).