Rich Keller
Contributor
How to become a regulator technician:
1. Buy a regulator.
2. Buy a hammer, a nice big one.
The correct technical term for item #2 is a BFH (Bigger Fracking Hammer).
Seriously though there has been very little real change in regs it the last 40 years, buy and old scubapro reg on ebay and talk to the people in the DIY and vintage sections here and you will get more help then you would have imagined. Try a mark 5 1st and either an R108HP or R109 2nd as these are the most common vintage regs, the R108HP being the easier of the 2nds to work on.