Thought I would post a status report from the front line (Battle of the quarter panels).
After an absolutely absurd amount of hours... I can actually see the light at the end of the tunnel.
I have managed to get the quarters/Tail panel/Wheelhouses/drop offs/braces to all play nice together. The quarters are not welded yet, but I have them 99% located in there correct location. I will then take them off and prime/seal and reinstall them back on before finally welding them up.
My largest battle has been the inner structure... with so much of the car removed, I couldn't base ANYTHING on the fact of prior placement of panels. Every panel had to be slowly tightened up until the entire structure worked together. I moved my drop offs at-least 5-10 times. Wheelhouses 4-5 times... Trying to not let any one panel dictate where the quarters would sit. After HOURS and HOURS of working the panels, I did start to get a feel for what needed to be moved and how it would effect the surrounding panels.
I have never questioned my build more than I have working on these panels. There were MANY moments of concern and frustration!

But there were also moments when the panels would actually cooperate and line up where they are meant to be!
This is FINAL MOCK-UP... before I take the panels back off to prime and seal the inner structure.