Brian

We have similar. Ours is a Bean Hustler. I'd estimate 100# of corn per minute. We have a frame that holds 3 proboxes & the blower. However, you can keep bolting on additional frames on the end to keep increasing capacity. Not sure of how many you can add..but they build them for flatbed semi trailers. The seed is drawn thru pvc into blower. Works just fine. We also dump bagged seed into empty probox so the blower can do all the work.