That is a pretty neat plan. If I was going to build it I would probably take out one of the crossovers in the middle. It looks too symmetrical with the x there. And you probably only need one reverse loop on the inside track. The one opposite the upper loop. Are you sure it’s only a 3% grade to get up to 8” in only nine pieces of curved track. I always figured at least 14’ of run to get up and over at less of a height. Just my thoughts. Pretty cool.
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