tsme -
Does that include V1 on a balanced field?
V1 was based on actual weight. Not much choice there. But.....that is another problem area...V1. Actual runway length isn't always considered in the V1 calculation. You might have loss of power on an engine past V1 and have 10,000 feet of concrete in front of you. Are you going to continue? Book says yes, but I say no. Again.....it's a judgment call. But...we digress.