Running the first cross with the short side ensures that both outer mains will be at equal tension. Make sure you increase the ss length to compensate. If you forget, just tie off as usual. No biggie.
1pc vs 2pc: Per USRSA. When given the choice, pick the one that allows the crosses to be strung top to bottom.
So, Wilson and Babolat use 2pc(orATW), Prince and Dunlop flip a coin, Head no choice. There are exceptions.
Neos 1000, Eagnas Combo 810