Quote Originally Posted by ths61 View Post
Do you think you could have gotten by with a thinner gasket/adapter plate to seat the speakers deeper?

TIA
The quick answer is yes. The adapter plates that come with the speakers are not really ideal. They too have to be shaved down substantially to fit of coarse. A superior choice would be to make some adapter plates out of wood or solid ABS plastic in the proper thickness needed.
The problem is the speaker basket / structure / spider hits inside of the speaker enclosure before the speaker sits flat so a spacer of some sort is needed.