Treestand, are you refering to the cut on contact tip not being easy to find. I was under the impression that the regular blades were the same as the spitfire. I just bought some XP pro 100's and assumed that the regular replacement blades were the same. I had not thought about replacement blades for the tip. I have been using the spitfire 100's for years and have had great succses. I just bought the XP Pro's to try like you and just assumed the blades were the same and could use the spitfire blades as a replacement. I'll call NAP today and find out what's up, I'll also ask about the tip replacements.