Hi Colin, thanks for your advice. Especially: > In general, I find the best way to study these sorts of things is to have a puzzle to solve, to work through i

Hi Colin, thanks for your advice. Especially: > In general, I find the best way to study these sorts of things is to have a puzzle to solve, to work through it, and then have a mentor demonstrate a little piece of magic that makes me feel stupid for not having thought of it (Actually, I could quote your entire comment, thanks, very much appreciated!)