Step 4: Cable Channels from the LEDs to the Supply (Router)
For the cable channels from the LED to the supply, we use a simple MDF board along which we can guide the router.
First, we mark a direct line from the drilled hole to the spot where the channel meets the pocket for the power supply. Then, we need to measure the diameter of our router plus the distance to the router ring. Using this distance, we draw another line parallel to the first line and affix the MDF along that second line. To ensure the board doesn't move while we route the cable channel, we use double-sided tape. If you think the router will tip over when you use it, use a second MDF board and stick it on the opposite side of where you want to place the cable channel.