Here is a Duel Stand Up & Inverted Coaster model built with the Coaster Dynamix Model systems.
Below are various construction photos, finished product and videos of the Duel Coaster.
This coaster was finished in November of 2009. The coaster was built with 14 bases, 2 - 2 foot long lift hills,
5 1/2 yellow and blue spines, with maroon support parts.