how do any of you deal with customers who demand or get upset if you can't do their lawn on a friday? i have a couple people who just don't understand that sometimes my schedule doesn't or the weather doesn't allow me to cut on fridays. they even snivel if i get there on thursday evening! i tried to explain that the lawn isn't going to grow much at all overnight.these people always pay on time and it's an easy cut so i would hate to lose them over an argument about this. any suggestions?thanx.