I was digging around looking for something to assist me in building some layouts without resorting to pencil and paper and came across this thread. I checked out SketchUp and I've had a blast playing with the software. I've never messed with anything like this before so it has been a lot of trial and error but I'm getting there. I havent found a way to round off the jumps for a more realistic representation of what I want yet but I learn something new every time I look at it Track dimensions are 30'X60' and everything is to scale so far.