i just bought a new Ferris IS2100 with a 61” deck and have a problem with scalping when cutting in reverse or going backwards while turning. I am forced to raise the deck higher to help avoid this from happening. The deck does not come with anti scalp wheels on the back of the deck ansonder if this is the problem. I first encountered this when I came off a sidewalk and down a moderate hill. Forward went fine but I backed straight up so I could cut again closer to a wall. Well the mower scalped full width as the drive tires rolled up on the concrete. Does anyone have any ideas on what’s going on? Should I add anti scalp wheels to the back of the deck.