I am having trouble getting the achievement for having a roller coaster that goes 200 mph+. I have tried almost everything including lowering the landscape so that I can make a roller coaster almost 400 Meters tall, that has a straight vertical drop downwards. It's max speed reaches about 182 mph but I would expect more for a roller coaster towering 1200+ feet tall dropping straight down. Does anyone have any tips or tricks that could help me achieve the amazing feat of having a roller coaster that tops 200!