Thanks for the warm welcome guys...
Yes, from my understanding the whole point of the push push design is to cancel out resonance from the enclosure with minimal internal bracing. They are firing back to back. Below is a design by Dave Dlugos using the Apex Jr, Super 8. This is my inspiration. But, I have some design hurdles to over come using the Tang Bands as both drivers in a vented box require close to 0.7 cubic feet [Vb].
http://www.apexjr.com/images/Super8PPBR.gif
Warmon -