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Oh, I just completed mine and only looked at the schematic very seldom -- following the excellent video instead. Amazingly all the wiring worked but it was very clear the servos weren't moving the expected way. I just swapped the pin assignment in the program rather than re-enter the box and revisit my horrible wiring mess. In other words, don't worry much about which servo goes into 9 and which to 10. Although I believe you do have it right.