here's whats going into that cutout.
http://www.radioshack.com/product/index.jsp?productId=2102834&cp=&origkw=terminal+plate&kw=terminal+plate&parentPage=search
6 panels .75" thick each
2 = 13" x 13" (1 needs a 11 1/8" hole in middle)
2 = 13" x 11.5"
2 = 11.5" x 11.5" ( 1 needs a 2 1/8" x 2 7/8" cut out)
Please be sure to include shipping to 85338
MDF means Medium Density Fiberwood