What's the biggest load that anyone has been able to lift with their single cylinder dump box (the lower cap. dumper). After my purchase I am a little worried that it wont be able to dump 1000 lbs worth of gravel. If I need to reduce the weight and then shovel some towards the back to get her to lift then I guess that's what I'll have to do. I wanted the 3 gate box instead of the HD dump with the smooth bottom and the top pivoting gate at the back. They seem to be a bit more usefull. Jon.