I've sent plans for the two π towers, so check your mail.As for the Beta 12LT, it works best in a 2.0ft3 to 10.0ft3 box, port tuned to 30Hz - 35Hz. PiAlign recommends 2.4ft3 tuned to 33.75Hz. It further suggests cabinet dimensions of 24" x 16" x 10.75", plus whatever wood thickness and offset for internal displacement required. The port it suggests is 2.5" diameter and 2.75" long.