VW GTI Antenna Mount

I've been thinking about how to mount an amateur radio antenna on my car for a while now. Everyone says the best way is to use an NMO mount in the center of the roof. But since I have a small car with a sunroof, there is only a small area of the roof near the back where it would be feasible. A backup option is usually a semi-fixed mount on the trunk, but my car is a hatchback so a magnetic mount will not work and there aren't any edges straight enough for a lip mount. Looking at all the various ways people have mounted their antennae, I ran across one person who had used a license plate frame mount under the bolts on their hood hinge. Looking at this location on my car led me to think this would be a really good location to mount mine. I got my father to help since he has the tools needed and we came up with a mount.