smallbuilder I am on the road so I can't check mine but they are 8"x8"x 40 something. Maybe one of the other members can chime in with the receiver dimensions for the 50 and Maxim.Thanks for the posts. Ill check them out. What would the smallest needed for a 50 build and a maxim build? I just want to make sure i get one thats big enough to do many builds.