Bill,
were you using some kind of laptop sleeve or case when you tried to carry it in the Banjo Brothers bag?
I've been following the recent thread somebody started on that bag, and it looks nice. Lot's of people seem to love it, especially for the price. I would actually use it more for traveling than cycling because it's waterproof and the waist strap is completely removable - excellent! However, the lack of a suspended laptop nest is the one thing holding me back.