Or what would be really nice for some of us would be if we could find detailed drawings, photos, or even plans for these unusual instruments. Pianolin, ukelin, dulceola. I recently saw a similar thing in an antique shop (or museum, since it was not for sale and they had no idea what it might be worth) a "Harp-Mandolin". They don't look like they would be terribly difficult to build.

Chet W.