Rick;
I guess there is a limit to how much you can do this depending on how you have the harp strung, as some notes would be missing. In my continued search for the "right" key, and in order to play with my partner whose range is quite different than mine, I now use 4 diatonic harps, D, F, G, C and am making up a pentatonic E harp. But, for jams, I am thinking of going back to a chromatic 15 chord model so I can change without such fuss.
Harpgirl, there is quite a difference in a C/D harp and an F. I wonder what Mark was thinking about?
Cheers
Richard Wright