Hi speedy,
trimmers are the pits, you can spend so much time on them and then people expect to get them for peanuts. I usually don't work on them but recently I have been repairing some just to reduce the number here. Once I get them sorted the rest will go to the scrap and hopefully I won't end up with anymore. Not sure how the cable ties will last and I have been fitting the Grass Gator heads on the ones I have here, they cost $15 but they are a strong head made in USA, not China and are dead simple to restring