I second JJ's caution about the ridgeline biners. They may have been minimally stressed with the spacing you tested the hammock at, but will carry much more stress if you set up with wider supports. An overlooked feature of the HH is that the ridge line keeps the sag of the hammock consistent over a wide range of support spacings. When supports are too close together, the ridge will sag, but as you space wider, the ridge comes into play to hold the sag of the hammock stable. When spacing is wide, the stress on the ridge line gets pretty stiff. Using the ridge line as part of the hammock structure is a good idea, and any hammock will benefit from it.
I don't use biners at all, but tie the ridge line directly to loops at the ends of my home-made hammocks. I use a sheet bend to secure the webbing lines to the hammock, and sew a loop at the tied end of the webbing. That is where I attach the ridge line. You already have loops sewn to the hammock, and that will work, too.