which reg do you think will have been better serviced?
The one that is serviced by the person who cares the most about doing it right. I learned how to rebuild my regs because I was way overcharged on a reg service (no courtesy of an estimate) and then the reg failed on the second dive because they didn't replace a diaphragm that was distorted. When they got the $10 diaphragm in, they did not want me to even install that myself because I wasn't "factory trained". O rly? Why did the factory trained rep put that distorted diaphragm back in my reg? They lost my trust and I demanded that they sell me the diaphragm, which they did (if I remember it right). I've recounted this in a few threads here on ScubaBoard over the years.
While I might start sounding like a broken record, let me reiterate: Rebuilding regulators takes certain commitments. Time to learn, time to do it correctly, money for tools and kits and the desire to do it right are all resources that you should commit to before you go down that road. My neighbor gave me a sign when I was twelve: Don't start vast projects with half vast ideas. Anyone who knows me can see how this concept has impacted my life over the years. I just don't do things half way. Pardon the pun, but I go whole Hog or no Hog at all.
Let me clarify further: depending on your mechanical expertise, you may not need a class to service your regs. However, if you are going to legitimately acquire parts, you need to make this commitment. Most manufacturers give yearly classes at DEMA and some do this periodically nationwide for shops who can't or won't travel. I paid to learn about Poseidon regs ($150.00 ???) and a shop allowed me to sit in their Atomics Reg class. Somewhere in there, I squeezed in a Zeagle class at DEMA. A couple of these classes were GREAT. At least one wasn't even worth the time I devoted to it. All of them indicate that I have made a commitment to servicing my regs. Here's a picture of the portion of my workbench that I have committed to reg servicing:
Here is the jig I made out of brass to hold regs while I test/service them. The two holes in front of the valve are threaded for both low pressure and high pressure ports to facilitate working on the rig with ScubaTool's first stage handle. Of course, I have a vise right next to it which is a bit more convenient.
No, not everyone needs to make this kind of commitment to the craft in order to rebuild your own regulators, but you do need to make some. No, I don't do regs for anyone else but Elena and me. Yes, I do teach the Hog reg class and so this is for my students as well as me.