The things to consider when going from hinged floor plate to DBM is spacing, where you may have to put a washer under the bottom metal frame and the design of the inlet on the front end of the inlet. If you mix and match parts from top release and bottom release this will be an issue. In the picture below you will see the difference in the two metal frames on top. One has a short boss and the other has a long one. There are work arounds but if you don't have too......