Please remember to alternate winches between rounds. Yes, you may think one winch is providing better launches than the others, but by the end of one or two flight groups, you have created a dead battery.
Things work better of there is someone to designate and "enforce" alternating which winches are used each round. Then the batteries have time to recharge on the off flight group. (Or at least charge a little). No one has chargers or generators out there capable of keeping a battery topped off if you are launching every 2-3 minutes on a winch.