Well, I was a boyscout when I was young and, yes, I did learn some useful things back then. So when we set up our new awning lately, I recalled the simple line-tensioners we made back in the days when we went camping with the boyscout group. They’re easy to make, simple to set up and cost next to nothing. Here’s how they work:

They’re a simple piece of wood, around 50mm long (adjust as you need) with the tension line inserted in a special way:


You can easily adjust the tension of the line as you need it. Made in 5 minutes, last an eternity, easy and convenient. You can also see this on Instructables.