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: Alan Schilke is an engineer and roller coaster designer based in Hayden, Idaho, United States. 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