What Design Engineer who works at Ride Centerline LLC designed a roller coaster that operates at Six Flags Magic Mountain in Valencia, California?
Alan Schilke:  He first made his mark on the industry by designing the 4th Dimension roller coaster, X, while working with Arrow Dynamics. Alan Schilke:  Schilke now works as a Design Engineer at Ride Centerline LLC. X2 (roller coaster):  It is the world's first 4th Dimension roller coaster and was the final roller coaster conceived and installed by ride manufacturer Arrow Dynamics.
i don't know