Hey there! Great question about the arbor knot. Based on the video context provided, it sounds like you might be experiencing an issue with how the knot is cinching down.
The arbor knot is designed to be a slip knot that tightens around the spool when you pull on the main line. Here's a quick rundown to ensure you've tied it correctly:
If your knot is coming undone when you pull on the free end, it might mean that the slip knot isn't tightening properly or the overhand knot isn't acting as a stopper. Double-check that you've tied both knots correctly and that they are cinching down as they should.
Additionally, some anglers like to add a small piece of tape over the knot to help keep it in place and prevent any slipping, as mentioned in the BassResource video.
If you continue to have issues, feel free to provide more details or ask for further clarification. Happy fishing, and I hope you catch some big bass out there! š£