Thanks Jon...it does, but the pH meter I'd be using more for my gardening (literally soil testing, not marijuana)
The ORP, more because my interest in this is not only being able to run the processes, but also understand the processes from a textbook point of view. While having a handful of gold is still cool, and something I didn't expect to be doing (figured I'd just concentrate on silver)...there's still a very nerd-esque part of me that insists I have a greater understanding of what's happening. You've gotta understand, if I could have a mass spec, FTIR & XRF....all in my garage....I would! But then I'd probably be playing with supercritical fluids too (I have most of the supplies, but not the analytical lab to back it up).
Plus, ORP is the one that offers the ability to automate. Which would be AWESOME for one of my silver processes. If the oxidizer dips too low, it stops passivating and starts attacking base metal.