It's been a while since I've seen a tight fit challenge, and those are good fun. I am also quite fascinated with layouts that try to so much inside a smaller footprint, and that in itself can be a puzzle. I tried a rough draft sample layout beforehand just to make sure it was possible to squeeze something decent in.
Compact hyper:
https://www.dropbox.com/s/q3tvkqyg3dlmkw7/Hypercoastertightfittemplate.nltrack
Rules are explained in the track info.
This is NOT a contest. This is just for fun. Right now this is the only one I have ready, but I am thinking about a Euro-fighter challenge as well.
If there is anything I overlooked, don't be hesitant to tell me. Maybe people can make their own challenge templates for others to try.