I have seen that problem on other brands with stamped steel engine covers. The area where the seat sets on is thin and stress cracks start around the bolt holes for the seat slide tracks. We used to take 1/4'' by 1'' steel bar stock and match up the holes for the seat bolts, extending past holes about an inch front to back , put them between seat tracks and hood. It helps displace the weight and helps keep the hood from cracking around the holes. Pneumatic trucks, especially with "Solid" tires that are operated on less than desireable surfaces are rough on engine covers and the seats as well. The rest of the truck in that product line is very durable and will stand up in some very harsh enviroments.