I think it would good if there was some way of leaving a footprint of the track layout on the the ground for pre set design coaster so you know where to lower the ground where the track requires it.Example at the moment you select a preset design coaster part of it goes under ground it wont let place it because part of the ground needs to be lower so you back out and then select terrain but now your coaster is not on screen anymore and you have nothing to go by to tell where the ground needs to be lower.