What happened to the idea from your 1st post?
Is the sub still in the bed of the truck?
Oh yea, haha.
Welllll... Not only did I rethink cutting into my truck without having more experience, I am also doing this to train myself to install systems in other trucks for a profit, and I figured boxes contoured to unique spaces is more in demand than my original plan.
I will definitely try the original design in the future!
Sorry if you were excited to see how it turned out...