Compares favorably to the leupold - Vortex Spitfire 1x-AR Prism Scope

This is a review of the Vortex Spitfire 1x-AR Prism sight with the DRT reticle, which consists of two concentric circles with a tiny dot in the center (maybe 1 MOA). It comes with flip-p covers and takes a AAA battery (thank goodness) readily available everywhere and easy to change out even with cold, numb hands. I am 53, an accomplished shooter and retired LE instructor. My eyes are deteriorating and I have an astigmatism so needed a prismatic sight rather than a red dot sight for fast work at 150 yards and closer. One of my fellow instructors brought a Leupold prismatic sight to the range last year and I loved it (he's in the same old man boat as I). Unfortunately, Leupold is no longer manufacturing those prismatic sights and they are hard to come by. I did a lot of research and found this one. I have not mounted it and shot it yet, but it appears to be of comparable quality in construction to the Leupold (really) that I examined and used on the range last year. The clarity appears to me to be the same and the cost is half. The reticle is etched so it will never break as wire reticles do. It is also illuminated--the full two circles and dot, not just the dot. I am still trying to work out this DRT reticle, but here are my observations (if anyone can help me please do): The inner circle (44”) will cover crotch to crown of an average man at 100 yards. The center dot to the inside of the center ring (20.5” round off to 20) will cover an average man’s shoulder width at 100 yards. Maybe there's a better formula for this reticle. I don't know. But I definitely love the sight and my home-made formula works for me. It is the only prismatic currently available as far as i can tell. Better get it before they stop making this one too.