I'm sorry but I must disagree. Unless you've been through a company seminar/repair clinic, you don't know what you don't know. The mechanics seem straight forward to you because you must be mechanically inclined.
For example:
It is not intuitive for instance to use a special tool when sliding the piston stem thru the wiper (Oceanic piston). Not using the tool may damage the wiper before you finish assembling it. Without prior knowledge and a special tool, you probably wouldn't know this.
Bottom line, there are people capable of and who are already doing their own servicing. It is my opinion that most shouldn't.
Safe diving,
Andy
In my last round of servicings I serviced 2 ScubaPro Mk10's, 2 ScubaPro G250's, 1 Zeagle Rezort 1st, 1 Sherwood Brut 1st, 1 Sherwood Brut 2nd, and one Sherwood Oasis old version. The only special tool I used was the ScubaPro bullet tool, which, interestingly, is the special tool you refer to in your example. Yes, the tool is specialized, but
at $6, it is hardly expensive. And frankly, it shouldn't be too hard to make one yourself. All other tools I either had them already in my generic toolbox or I bought them from a local place called Canadian Tire.
As far as training, my only training was carefully reading through
Vance Harlow's book once, and then using it as a reference while I was working on the regs. I also asked a few questions in the DIY forums here in ScubaBoard, and grabbed an excellent wealth of knowledge regarding equivalent oring sizes (great easy to understand annotated schematics), materials, sources of material, and even how to make your own "awap" seats.
I don't know if I would self tag myself as mechanically inclined. Maybe I am. But honestly, my biggest surprise when servicing my very first reg was how easy it really turned out to be.
Image of a bullet tool in use.
BTW I do not have a vise and didn't use a vise when working on my regs. Vance's book recommends it, but the peeps here in scubaboard told me it is not a total must-have. They showed me alternatives like the "foot-method"