With or with out a hood scoop?

I forgot to mention, I cut my hood to fit a full 14x3" air cleaner with at least 1/4"-1/2" clearance all around so I probably took more bracing out than you did. Particularly at the very back, I had to cut into the bracing there for clearance and I think that's what really made it more flimsy.
I boxed mine in at the back. Before that , it was somewhat "fluttery".

duster 5-10-17 006.JPG