These are my Golden Rules. I have distilled these from years and years of practice, practise (yes, they are different – look them up) and observation. Yes, they are the results of some of my biggest mistakes. I may be right about them or I may be crazy. Your feedback is, as always, warmly welcome. These CADmandments will evolve over time – the evolved a lot on their journey here so far. Nothing, Dear Readers, is set in stone, with the possible exception of fossils but there are none of those around here – right ?