Here is a coaster i've been working on for bout a week... it's nowhere near completion, but i've been working real hard to make sure it's really smooth and without any pumping or jerking.
It's an arrow coaster, (i'm an arrow fan), and it's themed after one of my favorite movies of all time, (which also made me not be able to sleep for about a week) the Exorcist. I'd like to put 3-Ds in it, but i'd have no idea where to start with those.
http://www.NoLimitsDevCenter.net/p5072