I think it might be fun to report on my coming project. I have a Milwaukee regulator which I don't appreciate anymore. So, I have been shopping for a replacement, preferably a two stage regulator with a good needle valve. I could just buy one already assembled, but then I would miss out on the fun of DIY, and being a cheapskate, I hate to pay for something I can do myself.
So, I found this regulator: http://tinyurl.com/cog9d2
which looked promising to me. It appeared to be a good quality, two stage regulator, missing a gage and CGA inlet fitting. With some detective work, searching for the regulator with google, I found that it is indeed a two stage regulator, and a very good one. Ebay lets you bargain down the "buy it now" price, which I did, and got my $16 bid accepted! Ordered.
Next, I found an Ebay store selling gages that would be suitable, so I bought a 60 psi gage for $11 including shipping. Ordered.
Next, I needed a CGA320 inlet fitting, and found a few on line, the best deal being one for $10. Ordered.
Last, I struggled with Ebay for a few days looking for a good deal on a Swagelok metering valve, but to my shock, I found that all of the good ones are now priced at $150+ (I bought one several years ago for less than $50) Nothing suitable was available on Ebay. That left me having to buy a new one, something I hate to do. I reluctantly settled for the Fabco NV55, from the Fabco website, for $27 with shipping included. That is a heavy valve, with 10-32 threaded ports, meaning it can't safely be supported by the fittings in those ports, so I needed hose barbs with 10-32 threaded ends - eventually finding them at Omega.com, for $13 for a package of 10. Ordered.
This morning Fabco phoned me to verify the O-ring material to be used - they build these to order!
So, my gamble is that the regulator isn't damaged, and still works well. Assembly will be next, in about 10 days, after I receive all of the parts.