I was overwhelmed by the great information that I got on this and other threads so I asked ct_vol for help. He gave me some good information that was specific to my situation but then I asked him if he would build me a unit.
He told me that he had a few projects going and that he would be willing to let me buy one of them. I told him what I was looking for and the price range that I wanted to work in. He gave me a few choices. I picked a dual stage stainless steel unit and we agreed on a price.
He told me how long it should take and he went off pulling it together for me. As he was doing his work, I decided to go with an Aquarium Plant digital regulator instead of a needle valve so he offered to send it on to AP when he got finish with his part.
He called AP to make sure that the fittings that he used would work on the digital unit. He got his part done as described and on budget and it arrived at AP without any issues.
Talking to the guy at Aquarium Plant, he felt that the ct_vol unit was a very good one. After talking to me for a while, he suggested that I get a remote unit that I could mount on the wall so I went for it.
The whole setup arrived and looks great! I have held off on posting this because it is taking a lot longer than I thought that it would to get other parts of my system finished. I wanted to show it working.
I decided not to wait on posting this and will add updates as I get the system finished. Anyway, I am very happy with what I got.
Thank you CT_VOL and AP