Building some speaker spacers for my new focal access 690ac. I have some high density plastic left over from work but it is 1 7/16" thick. Would like to mill it down to 1 1/4" instead of the standard 1" as the focals are deep (3 3/16s). How much room do I have before the inner door panel will not fasten to the inner door skin?
Will also be installing some cld tiles, ccf, and mlv for sound and resonance deadening. Thanks in advance.