I have the 54" deck with the power flow bagger on it. We started with the 2 bag system. We upgradded to the cart, I can't remember the number but it is the slickest deal out there. The cart attaches solid to the tractor and the wheels under the cart are crazy wheels which means the trailer follows the tractor exactly. When you back up since the attachment is solid there is no chance of jackknifing. The cart with the included cover is rated to hold about 17 bushels of material, then to dump you just back up to where you want to dump and pull the handle, it lifts the back of the cover up and allows the box to tilt back. Once it is empty just pull ahead, lower the box and push the handle back and you are ready to go again.
Hope this helps,
Todd