How interchangeable are the toploader main cases? The toploader currently in my 67 is of the 67-68 style. My case has a broken mounting ear and I found a 72 torino toploader for sale locally. I know the contents of my toploader are good so I was wondering if I could swap cases. I noticed the 72 has some extra holes on the driver side which is making me hesitate. I was also planning to give davidkee toploaders a call to see if they sold just the main case.