I am considering building a Two Pi with a slightly different twist.

What do you think of mounting a second 10" Eminence Alpha woofer on the back baffle to compensate for baffle step? The second woofer would be wired in Push-Push configuration. The reason I ask is there has been quite a bit of discussion regarding Push-Push implementation on the Single Driver Forum. Also, the Vandersteen 2CE's utilize a rear "acoustical coupler". The acoustical coupler is a larger woofer than the front woofer. I would double the box volume by doubling the vertical dimension and adding a second port. Are there drawbacks to this configuration? Is this feasible or just plain wacky?

Also, what is the shipping cost for a Two Pi KIT to Dubuque, IA 52003? Is the port included in the kit?

Best regards,
BobCat