The foam was just to mock up more easily, but as you can see in the 5th photograph I put little wedges down in the two holes and glued those to the sides, then the coroplast to the top.
For the center part it just kinda rested and I glued from the back.
www.crxmpg.com/grillblock.html for the full write up. Won't post it in the diy section here since it's been covered enough, unless someone wants me too. (Besides, we already have this thread.)
Bumper is in my garage. Pick up my coroplast (corigated plastic as per the sign shop) tomorrow for $11.22 for the 4 x 8 sheet. Hope to have mine on this weekend. I am thinking of putting in no holes. Has anyone gone no holes?
Just picked up another sheet for my undertray for $18 + tax.
And I'm going to have lots left over. I could have bought a bunch of little scraps and knitted them together into a patchwork, but decided to just do it big.