I would like to add a red dot, prism or a holographic sight. My problem is I have an astigmatism at close range. I've tried a few red dots and after a while the dot looks like hanging grapes, sometimes I see a dot with a line down to another dot. Then I tried a Vortex Spitfire AR Prism scope which I thought solved the problem but occasionally I see two reticles. The only type I have not tried is a holographic such as a EOTech does any know how these work with the Scorpion and with an astigmatism.