So my buddy bought a hundred plus year old house with some built-ins in the bedroom, problem was the TV components couldn’t fit on the narrow shelves. Solution: Ikea Billy extension. We began by cutting the sides and back down to 10” high so there would be enough room for the TV on top. Next we assembled the extension as the instructions indicated. We then used the hole for the screw in back as a center point to cut out a 1 ½ circle to run the wires to the TV. Two screws to anchor our hack to the wall and custom TV stand is done!
As always, enjoy the pictures.