A marble run that's made out of Dominoes (2-story building with double startup)

Same explanation as my 50 subs video, but used a different track.
This time, this is my largest track I've ever made that's not only dominoes, yes, I've expanded the marble runs to contain kinetic sand, but also domino boxes, these metallic sticks that form both startups (coaster startup and auxilliary startup) that end on a different point.
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