On Nov 14, 10:04 am, "Uncle Marvo"

I've got an el cheapo Flymo one, and I replaced the plastic string with
heavy duty plastic string (available anywhere) and it's a beast.

A friend of mine said he went to a more industrial type place and they
had some carbon fibre or wire reinforced type super-duper wire and I
don't think he ever had to change it again.