Keep those guy lines taut without the fancy knots. The universal ( Tent And Tarp Line Tension Locking System ) can be used as replacements for broken line locks, or added to tarps. Just attach the tension lock to any tent or tarp, thread the cord through, pull the line taut and secure. Your shelter will be secured so you can sleep easy.
Check the YouTube video How it works in action
https://youtu.be/jg1B9cqNVjs
OBS! works best with 3-5mm wide lines
You May Also Like: Strong carabiner for tarp or tent rope
https://www.cgtrader.com/3d-print-models/gadgets/other/heavy-duty-carabiner