Thanks. Guess you really can't go by what the company says. I'd really prefer 100% cowitness. My problem isn't the astigmatism, it's that I'm right handed and left eye dominant. I know you can change where you hold the gun to position it more in front of your left eye, but I don't really like that. I have a RDS on my AR pistol and I can keep both eyes open using it as opposed to having to keep my left eye closed with a scope, so I think the RDS on my Hellcat will be useful to me. I think it's at least worth a try.
Guess at this point, I'll stick with going with one of the Shield's at this point since I know they 100% cowitness. Just in case the RDS fails.
Appreciate the info for sure!!