@lowviz - My DH collection started backwards with purchasing a Kraken during the crowdfund campaign. It helped me by getting a "turn key" ready to dive DH to learn about. Love that reg, but I had to feed my affliction for shiny things. It was dumb luck/timing as I actually found VDH and the just kicked off Kraken funding campaign when looking for parts for my cherished ScubaPro 109's...
Since it didn't kill me like the shops constantly spewed old stuff would, I began to understand them and from there, I ventured into the old regulator world cautiously. Ebay became a hunting grounds, and had the misfortune of locating options, all meeting my criteria of really good chrome (freshwater sourced). I was bidding on a few when I found a nice "buy now" that was in great shape. Well, figured my bidding would miss as it had a few times already (I was being conservative in my bids), I bought it, only to find out the next few won the auctions! I then had three.... oh $h*t!
None of my DH are stock, I like the upgrades in performance, gauges, hoses, and service parts ease of availability. Note - get the modern hoses and mouthpieces (I prefer the DSV from Bryan) as the old rubber taste is not something of the old days I like to keep around - LOL.
Sent all three to Bryan at VDH, one retaining it's original look (1967 RAM) but modernizing internals by adding a Cyclone first stage, HPR second stage, duck bill eliminator, new hoses, diaphragms, etc., but uses a banjo for a pressure gauge. The other one (1967 DA) got the "full deal" with a DIN Phoenix, HPR, DBE, and new silicone soft goods. Another DA got a yoke version upgrade with a Phoenix, HPR, etc...
The DIN gets most of my diving as my tanks are mostly DIN (yeah, could but the inserts in the valves....).
All of these have really good chrome....
So, I wanted to have one for "yucky tasting water"... found a satin 1958 DA that I did the full modernization on myself (yoke Phoenix). It has gone to Curacao on our trips the last few years.
I began to explore, and obtained one of Rob's upgraded Voit Trieste bodies on the larger "FX"(?) cans. Ever evolving it then had me finding two OEM versions of Trieste regulators I want to get working "stock"..... TBD...
Lastly, the daughter wanted a DH after pool diving one of mine, so I have most of the parts stashed away pre-covid" to build her a pimped DA in yoke.....
I may have others squirreled away.....
Some guys head down the keep it original path, and dabble in those.
Read the DH101 you were linked to above, and then ask away.
We each have different experiences and concepts for out choices.
REPEATING - Careful, it is a real bad addiction....