Thanks, mojo, that is very similar to what I have in mind. I'm looking at various hats to decide how to proceed. I'm thinking I'll do a beret type top (subject to change without notice LOL). Before I do the provisional cast on I have to decide how wide I want the band to be. I want it to cover my ears to keep them warm so fairly wide I think. My MO is making it up as I go along. I leave designing to people who know what they're doing.
I should never overestimate my basic arithmetic skills.