Hi Intricate,

The MDF of the rear baffle is 3/4 inch. In reality, it's a bit less--about 5/8-inch. I don't think you need worry about joints separating. If you use 1/2-inch wood screws to hold the L-brackets, or whatever brackets you plan to use, the wood screws won't penetrate the enclosure.

Sorry Axiom doesn't have a cross-sectionional diagram of the M80 enclosure.

Regards,

Alan Lofft,
Axiom Resident Expert (Retired)