Thanks for all the comments! It was the 4 mags that initially caught my attention...like eastman...I was thinking 4 mags plus a slide stop is good value (maybe the conversion kit has issues).
When I picked it up from the seller and saw the entire LNIB ensemble - WOW!!!
Mounted the kit on a 75B frame and put 200 rounds down range. I had to adjust windage 2 clicks to get POA = POI, otherwise just load and shoot