i just bought a rear slide plate for my SD40VE and when I ordered it it said it was for a SD9VE. I took my stock one out and put it in my .40 and it seems to fit but I noticed it wasn't exact to the stock piece and also it's supposed to be for the 9mm. Can someone please tell me if the 9 and .40 are exactly the same. I'm not 100% for sure so I would like a little reassurance before I shoot it. I just don't want to take a chance on something bad happening for a decorative piece on my gun. Any help would be greatly appreciated. Thanks!!!