I am having some strange issue stringing my O3 Tour right now. I am stringing the mains just fine with my Topspin Cyberflash 17g 1.20mm. No issues at all. I seem to run into some strange issue when I string the crosses with the same string. I have a Gamma Progression 2 that I've had for the past year. The crosses are going just fine until I have about 3 or 4 more to do. I just go to pull like I did on all the prior crosses and am getting the tension just right when the string breaks. I don't know why. Its happened to me twice now and I'm just frustrated. I've had this issue in the past with this string, as well as the Unique Big Hitter string as well. Recently I was stringing my rackets with some cheap gamma string that came with the stringer. No issues at all. Those were perfect, except that I just hated the string but didn't have my new reel yet. I'm not sure what I'm doing wrong here. I have floating clamps. I will try clamping the string I just pulled, and I'll also try clamping that string and the prior one as well. Makes no difference. I've tried pre-stretching the string and not doing that. No difference either. It's warm here, not too hot, just right. I don't store my strings in a garage or anything. I just can't figure out what's wrong here. Please help me someone. I do have another racket that I strung recently with this string and it's fine. It's been fine in the past. I just don't know how or why I broke 2 in a row like this. It's frustrating to me to waste string. All help appreciated. Sorry for the long post.