Question: Could this plate also be attached to the back of a V-mount plate? Then you'd have everything on the rig.
Answer: Yes, you can generally attach the SmallRig MD3184 screw and hex key tray to the back of a V-mount plate, provided there is enough space and suitable 1/4"-20 threaded holes. The mounting is flexible and ideal for customized accessory management on your rig – just make sure that no ports, battery holders, or controls are blocked.