That's funny and predictable, i was doing sps by the end of 82, but back then sort of like you i was using my home made skimmers with air stone, then found a venturi was easy to make and live rock and available products and so on, same old same old!
Now i can do it with near no mech at all and in very different ways to you!
It was actually more then 30 years to get to where you are not, you see i didn't stop at what was available in the lfs, I never stop with what everyone else is stuck with if I can avoid it!
Plus I love the ocean and all of nature in general and always wanted to find a way to get out of the sheep run to do it similar to how the ocean does it, as I have been in it every chance I get since 1970.
I couldn't afford a chiller and made one out of an up right freezer with a manual dial thermostat controller set in a glass test tube with fresh water sealed in it, with it, the glass boxes in side took months to make to run from one to another then back to the tank and sat the test tubed thermo in my water, too noisy, so I stoped keeping corals in 85 I think it was, to hard to keep cool and just had basic inverts with far to many fish, very well I might add and from there I played with making tanks as well, big tanks!
To me, some of the thousands of marine life I would collect commercially went I to my endless experiments.
Any way I got my first actual chiller in 99 and got back into corals and more with this tank in the pic and sold it in 2007 and started on my ocean water quality experiment properly that was always on my mind.
After stuff up after stuff up with the figuring out the other components needed, by 2011 it was perfect, but I still kept going trying to improve on it.
Yeh, 30 years to get to where you are, that was over 30 years ago!
Behind that timber was part of my first success at getting away from what reefers are stuck with using.