Adjustable Clipping Plain

For many years I have been frustrated with the MAX camera clipping plain. Locked perpendicular to the line between the camera and it's target if usually fails to give me what I need in terms of "show me the inside". I need a clipping plane (two would be better) tha I can adjust to cut through a "box" exterior and expose the insides, then let me move the camera and target independantly to get the best viewing angle to expose the contents, straight on views either don't reveal, or slash through the things I want to show, the clipping plane obscures as often as it reveals as it should. A script or additional button (or buttons) in the regular camera control window to unlock the camera from its cutting plain then relock it again later would be a valuable thing.