Well, my wife has dove off of boats (why in heavens name is that even a specialty?), done deep dives, night dives, navigated quite well considering never using a compass until OW, & searched for and recovered masks that have been "misplaced" on the bottom. She is only OW. However she beats hands down a lot of AOW divers. Now, from most of the AOW classes that I have seen done, she is going to learn nothing. (I say most, because I was part of a NAUI class that was excellent, I have also been through numerous PADI & SSI classes) She is going to pay the dive shop some money, so that she can get some plastic card while in Roatan this year. Anyway, what I'm trying to say is, I don't know who is going to tell you that you have "mastered" a skill, and should do so before moving on. It isn't going to be the dive shop or any instructors that I have seen. Who would you work for if you kept telling students that they weren't ready to spend more money at the dive shop? Doesn't take too many students to complain about that before the dive shop will find someone willing to tell students to spend more money. Sure, there are those out there, but they are few and far between.