You've done good. Now enjoy it for a while. Just remember, you are only the care taker for a short time. Then it becomes someone elses turn to be the curator. The more you fondle the gun, the more you'll want another. I know from hard experience. Its all OK, just don't do it any harm.
And its story time! About 10 or 12 years ago I was negotiating to buy and older SIG P210. I didn't want the gun as much as I wanted the 5 magazines that came with it, and the unrelated 6 boxes of .30 luger ammo (it was a 9mm gun.) Its one of those transactions between a motivated seller and a motivated buyer. The gun had some wear and all I'd offer for the package was $1100. My gun show table partners wife knew the guy professionally, they were teachers. I knew I had the best of the guy when John's wife tore into me for being such a hard trader. And soon the guy was delivering the package to me.
Then he nearly skipped away, the happiest guy alive. I thought maybe I'd bought a hidden defect. But it was nothing bad at all. He was running to buy another gun, an early Python. For the life of me I couldn't get that excited over a Colt, but I was watching the events unfold.
What made him so happy was at that moment he finally owned every gun he had ever wanted or dreamed of wanting. I know, we each have different dreams and levels of dreams. He came back later and explained he wanted 6 guns. He'd been wanting them for years and years, but he also knew with his job and finances, it was only going to be possible for him to own them one at a time. I don't see the guy anymore at the shows. If I were to see him again I'd ask what the other 4 guns were.
There are guns I have wanted and could afford, but put off buying them when I found something I felt was even better. Every gun show I try to take along a wad of cash sufficient to get me in the ball game for a great gun.
In your situation, you've found one. We can't even agree on how many were made, or even what constitutes a RM. I fear for your financial health if you follow the path the rest of us have. One isn't enough. I'd even declared that I had enough and there would be no more. Then a short time later a buddy called. He had one of those Registered guns I kept buying. So to be polite, I asked him for the Registration number an serial. And sure enough, it was one higher than another I owned. You know what they say about good intentions. The road to poverty is paved with them.