I originally did this for an UQ, but could be flipped over for a TQ as well.
-First I marked out a cross pattern on the bottom of the military MSS patrol bag
-Then I did a heavy stitch a couple of times going around the marked pattern
- Cut it out close to the stiching.
- Finished it with some grosgrain and put loops on it for shockcord.
If I did it again, I'd make the cross pattern larger to let it slide down further on the hammock.
Also, if using a structural ridgeline, it needs to be detactchable to have the bag only go over the hammock and you, not all of that AND the ridgeline.
See pics below.