We mounted our T&E on the C&H plate. It was rock solid, I initially thought at times it was on there a little crooked but Steve said he thought the same thing when he started. I screwed up the directions on zero'ing but he squared me away and once there I believe I took the top gun on the 25 yard 10 round slow fire drill we did to end the day. C&H was awesome to deal with as well when I ordered. I told them I needed the plate quickly as when we got the notice for the 509 being shipped it was just a few days before the class. C&H shipped it quickly, I not only got multiple emails but also a text that the order was received, mailed and a tracking number. I had a question upon receipt and the owner responded with a text. I don't know how long they can do that as they grow but I couldn't of been more impressed, customer service goes a long way with me and they knocked it out of the park. We plan to make C&H plates a requirement for any future rds program for our agency. The MOS plates were okay, but none sat flat on the gun when mounted, one was bent and we just never had any confidence in them. The C&H plate for the 509 was an easy install and like I said it feels like its part of the gun and not an add on. I'd buy with confidence.