I'm 17 and a half I've been building coasters since I was 13. pretty much been playing with building toys my entire life. Quit for a while when i was like 11 -12 but still felt I needed it, so i got back into it.
I would have used a different song but that is not what matters. You have made a perfect scale model. If you can. add a mini wireless camera to the front of the coaster. that would be so much fun.
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4x1000000000000 (with 100 zeros) that's what the word google really means, its a number.