OK - so I have a question. I haven't read the posts after this one yet so I don't know if it's been asked and answered.
If DIR-F is a class on fundementals that should have been taught in OW, why is it that (in my experience) those that have taken it are reluctant to pass along some of the good information, but instead encourage you to take the class?? Can't they show you the kicks? Can't they tell help you with the trim? I'm not necessarily talking about free instruction, but just divers helping divers.
It seems like a de-coder ring type of mind set to me, also. Although there have been some extremely helpful folks to me on certain aspects, but others are tight-lipped and say "take the class".