You can't as the fertiliser in the bucket is automatically weighed as it goes from the truck into the loading bucket and all the tell tales in the machine would show if anything is being overloaded, besides thats not in Simons nature - one of the true professionals here in the kiwi aviation industry. There are a few small things that need to be ironed out but overall its a great little machine. He is getting the high skid gear later this year when its certified. Will make a big difference for ag ops out in the field.