I'm about to start work on my third DIY hammock and want to do a little more professional job than on my previous two. For my first 'upgrade' I wanted to make sure the edges are square when I start(I know. But it has to do with mindset.). I trimmed across the fabric using one of the ripstop pieces as a guide thinking this would be the best idea, but it's the crookedest looking thing I've ever seen.
How do you make sure you are square to the edges of the fabric?