Stone once bubbled...
If you haven't done so already, buy and read Vance Harlow's "Scuba Regulator Maintenance and Repair"
Damn Right!
I'm always a bit bemused at how people feel they need "official" training for regs. I mean, can you imagine someone posting on a Corvette list "How can get certified by Chevy so I can work on my Vette?". No, they just buy a manual and start in, and if they can't read too good, find a buddy who knows how to do it and learn by doing. But divers are different - they seem to crave that stamp of legitimacy that they feel only a manufacturer's tech course can give them. Never mind that the course is only 1-3 hours long which just isn't long enough to give a good grounding in the subject, assumes a lot of prior knowledge, and only covers one or two models.
The other thing about tech courses is that you sit there pretending to rebuild a reg that has been apart a zillion times and everthing is only finger tight on. You don't have to deal with the really hard or tricky stuff - getting frozen parts loose, inspection, or tuning.
By all means take any manufacturer's tech clinics you can - I still do, whenever I get a chance. But don't lose sleep thinking that they are the only way you'll ever be able to work on your regs, or worse, fool yourself into thinking that getting a certificate from one will somehow magically guarantee that you are qualified and safe to do so.
And perhaps more to the point, don't think that taking an official course will allow able to buy parts. Most of the reg manufacturers say no - SP especially is very emphatic that SP regs must be serviced ONLY by a trained SP tech, working on the premises of an authorized SP shop.
Oh, and the more you learn BEFORE you take the course, the more you'll profit from it. The better the course is, the less it will be directed at complete beginners.