We ended up remaking both outside parts of the aft baffle. Here Adam is using the fan spacer to make pilot holes.
With the aft baffle clecoed in, we marked the proper hole location for the intake tubes.
Before they were way off.
We still have some tweaking to make it easier to assemble.
This corner was tricky. Not quite done yet. I recommend not bending the front of the side baffles until you fit the front corner piece. That allows you to mark where the front corner piece is happy, and bend there.