Well, I have thought about open baffle. "Rare! Altec Open Baffle Woofers!"
Not the best choice, but hey, I've seen lots of guys run less optimum woofers on OB and love it.

Also thinking about the magnet. Does it come off? Will it go back on straight? You know that bolt you can see thru the hole in the dust cover. Does it hold the magnet on?

Gotta measure them again.
Still thinkin'......