The smile on my lady's face when I inform her that we turn left upon boarding is more precious to me than rubies. So I blew miles for upgrades on our last flight. But the co-pay galls me. Two questions. 1. There were two legs in each direction. We got upgrades on only one leg of each direction. $125 co-pay. Would the $125 have covered both legs, had we been able to get the upgrade for both? Or would United have smacked me with $125 per leg? 2. Is there any strategy to minimize co-pay? Can any of the awards sites help?