I know it will probably never happen, but wouldn't it be great if DA aquamaster would agree to teach an online course in reg service? It could be done really well, with lots of photo-intense lesson plans, some online chats for Q&A, and maybe to start all the students could buy an inexpensive older simple reg to rebuild for the class. I'm sure there would be many interested people willing to pay a fair tuition and invest in tools for this.
I took an online course in acrylic fabrication from a marine aquarium site, and before too long I was making filters and other devices for lots of professional coral propogation facilities. The point is, you can learn ALOT from the right teacher even in an online situation.