Okay, I finally got a chance to set it up to mess with. Seemed to work well, I just did it with a straight threw mainline for the second RL with an alpine butterfly to hook my hammock onto. Keeping/setting tension initial was a bit annoying but wasn't that bad. Setting the tarp up and then doing the hammock after the fact without coming out from under the tarp was easy and a potential advantage if its raining.
PS. I'll upload some pics of it when I'm somewhere that has a connection that will actually upload.