Sure the one I no longer have holds up. And it was tossed into a box and shipped.
Why did you cut the bottom out
Of course. That's the way luck is supposed to work apparently.
I had thought that I was going to put throttle components under the layout, but the space ended up only being used for a screw-terminal strip.
Do you mean a 12" square, or 12 square inches (the actual open area is more like 3.47" square)?
12 square inches. An approximately 3"x4" rectangle of open space.