you can with a hydraulic feeder, didn't know if anyone had gotten that fancy in my absence here. I had built a roller/bender years ago, but that was sold in the great breakup
UB - it would be good to see you again. I'll let you know how I progress. I am working on a design that would be like the one in the link below, but with removable crossbars that would allow me to drop the topper and higher height items in the bed.