I will make you a roller coaster. All you have to do is send in the list of mods that you would like, a seed you would like, the version you would like it in, a rough map (from a seed finder) of where you would like the roller coaster to go, and/or your other requests (like make it less than 7 minutes). I will review the suggestion and see if it is a project I would like to tackle. I make no guarantees, but I might make a roller coaster for you.