Purchased a "Fixed-Cut" head for my trimmer at the beginning of the season. Salesman said that this is the best way to use trimmer line. (No spool to wind...) Just stop cutting and insert an 8" piece of line and continue cutting. Problem is...the pieces of line keep coming out of the eyelets as I start working again. It seems that I am stopping more now to pick up the piece of trimmer line that blew out to re-insert it that ever before. I'm thinking of going back to original spool of string and avoid the hassle. Anybody else have this problem?