The MB 650 is a great trap that is a little on the complex side.  Our Expand-A-Pan welds on the existing pan on this model, and there are lots of angles, cuts, and shapes that had to be taken into account as we developed this pan.  The end result was an awesome fitting Expand-A-Pan that measures a huge 17.153 square inches of surface area and protects almost the entire "inside the jaw" area of the professional trapper's trap!  Expand-A-Pan, Go Big Or Go Home!