Copied from another thread -
Since I removed my hood to install extended range hood hinges, I decided to install my Hahn CoolRam Airbox designed for my Hahn turbo. I previously had the Hahn CAI which uses the same box with the opening for the air tube on the driver side instead of the turbo's passenger side. While installing the new airbox, I realized the support brackets had not been made properly because the holes to connect the brackets to the airbox were not drilled properly. I drilled new holes so the airbox would mount lower with the front end of the airbox resting on the bracket behind the center headlights.[s][/s] When I went to test close the hood with the new hinges, I went to gently push down on the same locations I have always used to make sure the latches were securely closed and I was EXTREMELY unhappy when I saw I now have 2 star-shaped cracks in my hood paint from the edges of the airbox pushing up against the hood. 
Since I had my Slingshot painted yellow a couple years ago, the repair is not going to be easy or cheap and I am very displeased. I will be going out to try and trim some of the upper front corners off the airbox for additional clearance. Hahn supplies some heavy rubber molding that fits over the edges of the airbox and seals against the hood, but I hadn't installed that since I wanted to check clearances. My earlier Hahn CAI used the same rubber molding and it pushed up against the hood making it harder to latch, so I had used some foam molding designed to seal window AC units in place, but I hadn't yet installed the foam molding.
UPDATE - After looking at my installation some more, it looks like I may have screwed up in that I secured the rear of the airbox first. Had I mounted the brackets to the airbox and then tried the install, I probably would have realized that the front edge of the airbox needs to be below and not resting on the edge of the frame behind the center headlights. That would have placed the CoolRam airbox low enough to not contact the hood! Looks like the cracks are indeed my fault for failing to think thru what I was doing and not taking the time to find the instructions I have for my turbo install. Of course, it being my fault just makes my day suck even more! At least I have an excuse to try repainting my Slingshot at some point (although I definitely lack @Painter's skills)!
I now think the improper location of the airbox was also why my hood didn't seem to closing and latching properly. I had thought the hood had somehow gotten repositioned during the hood hinge install, but now it seems the problem was me having installed the airbox too high and basically causing the hood to get propped up!
After reinstalling my airbox using the holes hahn drilled for the support brackets, I believe I now have the airbox in the correct position.
If you follow @'samowens44'' TD Hood Hinge Install video, everything should work properly once you reattach the hood to the hood brackets. Unfortunately, because I incorrectly positioned the Hahn turbo airbox and didn't realize that its incorrect positioning was the reason my hood wouldn't close properly, I proceeded to loosen the bolts holding the hinge mounts in place. Since the gas cylinder that assists with proper hinge operation was still installed, as soon as I loosened the hinge bolts on the passenger side, the gas cylinder forced the hinge mount forward and really threw off the hood's alignment. I strongly suggest that if anyone who has the MadStad/Twist Dynamics extended-range hood hinges ever needs to adjust the hood hinge mounts, REMOVE the gas cylinder before loosening the hinge mount bolts!
Now that my hood alignment has shifted so much, it will take careful tweaking of the hinge mount positioning to ensure that the rear latch pins are properly oriented above the rear latches. It doesn't take much movement to make a big change in the latch pin locations. One I have the rear latch pins properly positioned, I think all I will then need to do is to adjust the front latch positioning so they are properly positioned under the latch bolts attached to the upper hood hinge bracket.
I also plan on calling MadStad tomorrow about using 2 gas cylinders instead of the one used in the current design. I think having a gas cylinder on each side should balance the forces of the gas cylinders.
I plan on posting an update later.
