Like many, I have a dual head set up (twin LE30) units in both cars. I also have an extra head I'm not using just yet. What would happen if in my current car or the next (I have my eye on a 335xi) if I mounted THREE heads in the front? I don't have rear protection as I havn't been able to figure out how to neatly mount the unit without it looking really bad and, worse still, really obvious.
Also, would it make a difference if the unit was an LPP or AL?