I've built a few instruments - banjos, Mt. dulcimer, Hammered Dulcimer, kalimba, some whistles of PVC. My wood top banjo can be seen in the Mudcat pix. Since that picture was taken I've had to make some reinforcements and reset it. I've recently discovered "D" tuning (f#DF#AD)for the banjo and it seems this is the tuning that the old wood top sounds best in. I'm practicing "Wildwood Flower" these days. It's really satisfying to play an instrument you've built yourself.