Had time to fire it up after redoing my flanges with better hardware and applying cooper seal to the four gaskets that were leaking. Initially, I thought one leaked by, but upon further inspection four leaked....with one that was more noticeable than the others.
Final result.....all is good.
Took it on a test drive and no B.S., I can tell the difference on what this properly sealed cat-back system sounds and feels like. Wow....what a difference fixing the flange connections.