I think I get what you are talking about. Some of the early versions just had a mounting board with new driver, you pulled off the old driver and just placed this new mounting board/driver directly over the existing hole and screwed it in place with four wood screws. This was my version anyway.
As to the crossovers, mine were all in the can itself and did not come with any controls. So the old crossover/controls were removed and a new plain terminal block/board was mounted in place-hence the hot glue.
So sounds as if some things have changed. The main thing is how they sound though, and hopefully you will enjoy them! Thanks for the response!