Ok, I know you have to kneed the fondant really well and I can do that just fine with enoughto cover the 8"s and 10's but when I get to the larger sizes I have a hard time telling if I have kneeded it enough.

Is there some tell tale sign that shows up when i'm kneeding the larger balls of fondnat that will tell me I'm done kneeding?

What am I missing here?

First of all, I knead parts at a time. It's difficult to knead several pounds at a time adequately. Divide the lot into smaller balls and knead each well. To check if it is kneaded enough you can roll out a small portion and you will see the color is even and the fondant feels very soft. (A tip is to put a pound or two at a time in the micro for 10 seconds or so) MUCH easier to knead, but work fast as this tends to dry out the fondant faster. If after application on cake you have elephant skin ir small cracks, rub with a touch of crisco into the fondant until crack disappears.

Good luck

Thanks, Exactly what I needed do know.