Hi Mark
An honest and open report - nice one. The RB learning curve is a tricky bugger - it starts out feeling really steep, but then after around 15-20 hours it seems to flatten off... until you meet the next big step. There's a Rich Pyle quote that's something about being an expert after 20 hours, a novice after 100hours and a raw beginner after 500.
As Padowan mentioned the mouthpiece is one of the areas that just isn't covered by +/- tests (along with internal o rings), which won't show up during a pre-breathe and which might take some time to manifest itself during the dive. Alpinism anyone ?
