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That's a lot of questions. In lieu of a triple, Campy offers a 50/34 with 11-25, 12-27 or 12-29 cassettes. You can combine the 11-15 from an 11-25 with either of the other two cassetes to create an 11-27 or 11-29, but the 15-17 shift won't be perfect. The 50/12 top gear is a lot like a 53/13.
I'd try a 175mm crank with your inseam.
Aero wheels at your weight? Forget that. Stick with something more reliable, like handbuilt 32H.
That's a lot of questions. In lieu of a triple, Campy offers a 50/34 with 11-25, 12-27 or 12-29 cassettes. You can combine the 11-15 from an 11-25 with either of the other two cassetes to create an 11-27 or 11-29, but the 15-17 shift won't be perfect. The 50/12 top gear is a lot like a 53/13.
I'd try a 175mm crank with your inseam.
Aero wheels at your weight? Forget that. Stick with something more reliable, like handbuilt 32H.