Thanks for that info! I watched a video on U tube on how to do it. Seems that if the bark is removed over more then half way around the tree trunk, that it won't work, but I might give it a try anyway. Since the tree is dormant now, and will be for a while yet, It may not be too late to try. I think I will try to graft some of the Cortland to another variety tree and at least have some fruit in a few years. I've never tryied grafting before, but was always interested. Thanks again for that information.