No overheating, no issues at all honestly. I used a small drywall saw to adapt the foam.I've been busy for awhile and lost track of the thread. Thanks for posting your details, I appreciate it and think others will too.
The stock 3.5" HK speakers ran pretty low. I would guess around 500Hz and 3000Hz for the coaxial tweeter. I do not know where the non-HK system is set for, but it too is a coaxial, so I would guess the frequency range is the same.
I would love to see some photos of your setup if you can post. Does the CV sub have an integrated amp? Any overheating problems? What did you do about the panel and cargo tray that sit above the cargo floor. I'm sure many people are curious how you resoved this.