Thanks, M.Ted.
I keep forgetting that my complete inability to read music blinds me to others' inabilities in different areas. One of the reasons why I keep encouraging my daughters (only in high school but very talented players from dots) to acquire a good ear as well. I'm not sure of Tom's reading (he was doing it all be ear when in my company) but Ian is a renowned composer as well these days (some may remember him from Pyewacket) so he could have handled anything.

Cheers, Rowan