HPower Messages: 16 Registered: October 2013 Location: Newmarket, ON Canada
Chancellor
I did something similar when I built my Cornscalas a couple of years go.
As you can see, it also makes an ideal way to support the horn and driver, and in the case of the 4Pi a nice platform to lay the insulation on.
Mind you, the Cornscala Brace pictured above has a larger footprint than the 4Pis will have...
13.5" deep x 23.75" wide, with 5" x 9.5" ovals.