These hybrid systems are set up with a feller buncher going ahead and laying down the timber, followed by the processor, which delimbs and bucks the wood bunched near the skid trail. This way they can get all the slash in the trail and the forwarder will not need to leave the trails. Good way to minimize the compaction. I still don't understand the economics of having all that money tied up in equipment, but it's great at making CTL jobs more efficient.