We ordered ours w/ the toppers, but frankly, tho it might be a couple hours job if doing it yourself, better off letting a RV dealer or the like do it. Parting w/ some good bucks may be difficult, but peace of mind and my safety are more important. Like another said, big toppers are heavy. Only gripe I have is that I wish they had bit more of an angle to them so water will run off VS sagging. Have learned to make sure all doors are shut and not to stand anywheres near them when being brought it. Water coming off them is like a cow peeing on a flat rock!