I'd like to know how the XL fly is working for you on that rig. I copied what you did today and I'm very impressed with the results. I will wait to get outside and play with the hang better to determine my ridgeline length.
I completed the mod but ran the ridgeline through the rings that attach to the tarp. I also added a ring in the middle of the mesh portion so the top is supported in three places on the ridgeline. Between these little things I did, it really opens up that mesh and I'm overall happier with the hammock now.
As far as I can figure out, the tarp attaches the exact same way it did before. I don't see it as a problem even though the netting rides higher in the set up now. The two contact points for the fly never changed, just the height of the ridgeline. The good thing is, if it does not work well, I can re-string the line above the rings and use drop down loops.
I had thought about that, but then looked at the length of the front shock cord, the gap between the mesh/ridgeline on the foot end and attached the fly as normal. It looked like it had good clearance.
I thought I'd try it this way before finding myself not able to get the fly lines up high enough when using the hammock backpacking.
The beautiful thing about this set up is that there are many options and if something doesn't work right, it's easy to modify or change during use.