Slot Car Controller Holder

After looking at many different controller holder pictures online, I designed these to fit over the top of a 1" (3/4") thick shelving board.
You will need a left side, a right side and 4 standoffs for each controller holder. I used Small Parts Steel Pan Head Machine Screw, Zinc Plated, Meets ASME B18.6.3, #2 Phillips Drive, #6-32 Thread Size, 2-1/4" Length, Fully Threaded, (Pack of 25) to do the 4 lanes. For screws per controller, will also need washers and locknuts. Everything fit great with no trimming or adjustments of any kind.