Hi.The problem I have is that the complete spinning head unit flies off my ancient B&D GL565 grass strimmer.Looking at the exploded parts manual everything is there but the alloy "cap" would appear to be part of the motor extension shaft but is not a tight fit and does not appear to be permanently fixed in any way to the main shaft.All the head parts are screwed onto this "cap" so if it comes of the motor extension shaft everything is bound to come off the strimmer.Question is --how do I tighten/affix the"cap" back onto the extension shaft?

maurice blencowe, July 2006

It's not supposed to be an alloy cap (cone). It's supposed to be of heavy duty plastic with a metal lug for threading the line. I've just bought a new replacement plastic cap from my local DIY hardware store. They are probably not common and it cost me nearly £7 in 2010.

Grambo, August 2010