I volunteer at my son's elementary school and found some of the teachers wanted their stuff relocated. Went through a couple of designs and found these to be the most helpful. I printed these in white PLA so they kinda blended in with the tiles and tracks. I put the wires in the printed pieces, clipped them onto the tracks and everything was good to go. The important thing is to make sure you have a high infill percentage. Say around 30% or so. The reason is when you flex it a bit to clip it onto the track, it will snap if the infill is too low. I accidentally printed some with 15% infill and they all snapped. Told the teacher I'd be back tomorrow with better clips...