Yay!!!
I guess the lesson here is that if this issue pops up during install, remove, give it a hard stare, put it back!
You know, now that you've done it I think I'm going to give installing this myself a shot. The DIY here is pretty clear (and I've taken the exhaust from section I back off before) so what the hell, I'll try it on my car first before 'Kitty's car. Thank you for the coupler tips.
Let us know what you think once you test it out!