December 4th will see the 20th anniversary of Frank Zappa’s death. Inevitably between now and then, we can expect a dramatic increase in discussion about the man, his legacy and his broad ranging musical output. So in order to stay ahead of the game, it’s time for a refresher. Refresher that is, for those of you in the know. For all the chancers out there it’s more like a crash course allowing you to pretend to be less of an ignoramus online or in the pub or wherever you try to inject your tuppeneth, welcome or otherwise. The Chancer’s Guide judgeth not.…