Been looking at a killbros 1800 grain cart and the bushel capacity listed on the descriptions have all been a little different. Some say 900 bushel, some 950 others 1000 bushel. Does anybody own one and can tell me what theirs hold. Maybe these numbers are a little different, depending on how high you heap it up haha. But none of the grain carts that I looked at had extra extensions on them that would make them hold more. I know their isnt THAT much difference between 900 and 1000 bushel but would like to just dump 1000 bushel in the semi and go and not worry about topping it off. Plus 100 bushel differnece on each load adds up.