I'm waiting for my PX4 slide to come back from LTT so I can install the Holosun 507c I've bought and slip it in the JMCK IWB3 I have waiting for it...and in the meantime have reverted to carrying the 3" M10 that I had parkerized. And I have two other PX4s. I'm going forward and backward at the same time.
My eyes are strange; my left eye is 20/20 and my right/dominant eye is about 20/300. With glasses, I can see the front sight clearly with either eye, without glasses I can see it blurry but useable with either eye. I have no problem keeping rounds in the -0 of an IDPA target at 25 yards shooting DA. Right now, I don't need an RDO, but at 69 those days are probably numbered and I want to be ready when I do need one.