Thank you Joe. This friend of ours has been doing some work on the subject
Dennis Bathory-Kitsz <email@example.com> and is pretty knowledgeable (ie. once he gets talking technically, I haven't a clue) He has done some work with my husband who is finding a mouse increasingly hard to use, and may have some new, wild ideas on the subject.
Sorry I didn't catch up with you while out west. I highly recommend those Swan household music parties.