Bristol notes are A1. I read them, re-read them and then re-re-read them some more. It all began to sink in, bit by bit by then. I struggled at the beginning, but by digesting the info slowly and then jumping on the QB, it made a helluva lot more sense! The Bristol brush-up is fantastic and will get you through, so do not worry too much, as long as you understand the basic and fundamental processes of met.