Aw, thanks a million to both of you! In answer to the Shruti box question, you pump it in and out with one hand, using the other to flip the keys to change the chord being sounded -- there's a photo of me playing mine on the Links pages of the website, along with a link to the website of the fellow who made it -- see http://www.sarahmcquaid.com/links.html

Cheers,

Sarah