the BMI allows you to run a damper disc or damper tube setup. You get 2 upper pod plates (one for each). just make sure to understand that all the holes for the tube mounts are drilled to be tapped 4-40. i didn't know there were tubes designed to accommodate 4-40 cups. so jason is taking care of me and some 2-56 holes. the other nice thing about it is the cut on the bottom side of the chassis that recesses enough for tape so it isn't exposed as much (nor are the batteries).

great service.