I have a FS90 and I am having problems with it. I got it as a gift for Christmas and began using it a month or so ago. The problem I am having is the line keeps breaking at the head. So I took it back to the dealer and he suggested the new auto cut head. So I bought it, installed it and yet the same problem. The line seems to break flush at the eyelets, I guess that is what you would call them. I have to stop and pull it back out of the holes. I am using stihl line. What gives, two different heads and the same problem. I actually stopped using it and went back to my trusty old Echo SRM-210. I have used the 210 for 5+ years and this has never happened once. Also to add, I really do not like this trimmer, really prefer the Echo over it. Looks like it may go up forsale. Any help here would be great. Thanks.