Somebody help me out please. I want to buy one of those adaption plates that mount in the rear sight dovetail and let you mount a Romeo red dot on a slide that isn’t optics ready. The sig catalog has two to choose from. My 229 is a legion pistol chambered in .40 S&W. Which plate do I need, the one for the 229-1, or the one for the 229 non-1? Thanks!