I have a 3 year old Troy-bilt 4 cycle gas string trimmer that takes
attachments ((either TB575SS or TB525CS--forget which and have the
manual in front of me). The string on my trimmer keeps getting stuck
inside the spool. It's a real pain to have this happen in the middle
of a job.

Is there a replacement head, spool, or trimmer attachment that's less
likely to break on me? I love the basic unit--starts fast, and I have
the blower and tiller attachments.

Thanks.