Samsung Wireless Surround Headboard Speaker Hanger

I designed this to hang the Samsung HWA-8500s wireless surround speakers from my headboard. These speakers are a match to the Samsung M360 soundbar with subwoofer. Features in the design are:

* Inner wire trough to hide the wiring under the hanger.
* Exit port hole on the back of the hanger for hte wiring.
* square 45 degree angle holes so that no support structure is needed for the holes

My headboard is slightly tufted and has a back-to-front width of 3.5 inches, which accounts for the