Perspective
Please don't take offense if you've already considered this, but..........
Are you taking into account "perspective", that is your line of sight from the drivers seat?
I installed my own shield. Standing outside looking at the Nitro, it is level. Measuring from the ground up, and/or from the edge of the hood, it is level.
However from the driver's seat, it appears to stick up about a 1/4 inch above the edge of the hood, while falling below the hood on the passengers side.
Sit in the passengers seat, and the results are reversed.
Mine went in very easily. I used double sided tape, started with a center line, and allowed the mounting tabs to sit where they fit the flattest. Once held in place with the tape, I center punched the holes, drilled (holding my breath

and screwed her in.
Again, sorry if you've already considered the sight perspective in your installation, just wanted to make sure it wasn't an issue.