Not gonna lie. The loomis head has been a struggle for me. Specifically the side plane and the minor axis. Whenever it comes to cylinders in drawing objects or environments I don’t have a problem and the perspective off whatever I’m working on is correct. With the heads though it is a struggle. This is my most recent sketch after watching this video. Honestly it’s the first face I’ve done that ‘works’. The other one is an example of how these tragedies normally turn out.