Can always remember trying to make my Ford Fiesta quadraphonic. It had 2 rear speakers fitted in the rear quarter panels, and wanted to add some sound to the front, so stupidly bought some rear speaker pods for ease and self tapered them through the hardboard side foot well. Every time somebody got in they kicked them off, to such an extent the holes grew so big everytime somebody got in and shut the door, they would end up with the pod on their feet. My Excuse ... I was young naive