Wow that's not bad at all for the amount of work done, basically turn key operation minus buying the RMR. Makes sense about having the rear fixed sight forward of the RMR in those circumstances. To me the only reason I thought I'd put it at the rear was if I could use the existing dovetail for the taller rear sight but sounds like that was a no go anyway plus as you said, the real estate available on the slide. Have mildly toyed with the idea of not even using a fixed rear iron sight so can maybe just use rear dovetail for mounting RMR. First gotta decide on WHICH RMR and WHICH size dot or reticle. Initially leaning towards Vortex Venom but probably go with Trijicon, can get the Dual-Illuminated RMR for $400. The green triangle reticle looks interesting.