I thought I provide my blueprints for anyone, who is searching for minecart blueprints. I have yet to test powering the the whole thing.
For the top level you have to cancel the track designation on first row second column (invisble!) otherwise you get a West orientation on top right corner track you probably do not want.
For the bottom level you should change the channel to a dig square.
#dig,,,
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`,`,h,
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#>,,,
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`,h,d,
#>,,,
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h,`,`,
d,`,`,
#>,,,
d,h,`,
`,`,`,
`,`,`,
#dig,,,
`,`,T,
`,`,T,
`,`,`,
#>,,,
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`,`,T,
`,`,T,
#>,,,
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T,`,`,
T,`,`,
#>,,,
T,`,`,
T,`,`,
`,`,`,
#dig,,,
`,T,T,
`,`,`,
`,`,`,
#>,,,
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`,`,`,
`,T,T,
#>,,,
`,`,`,
`,`,`,
T,T,`,
#>,,,
T,T,`,
`,`,`,
`,`,`,