Dry Box Backing Plates

I initially used these filament feeders and rod holder in my first attempt at a dry box. However, I totally butchered it. I now need to patch the holes I made to make them airtight so I can find a better design that works for me. I took the measurements from the original feeders and simply made them in to flat objects without holes or any other purpose. I made two: the outside plate has rounded holes to allow a more flush appearance with the screw in place, and the inside backing plate allows the same with the hex nut in place.