Looking at a bowed psaltery hanging a friend's wall last night - it had the usual string layout, white notes on the right and black notes on the left.

If you're playing with two bows this is very inefficient.

Seems to me you could do a lot better with either:

- a diatonic layout, left and right split like push and pull on a diatonic harmonica or melodeon

- a chromatic layout, like a B/C or C#/D melodeon; left in one key and right in the other.

Has anybody made them either way?