On Wed, 25 Apr 2007 21:19:58 +0100, SimonW
mused:

On the bottom hinge I have a small piece of plastic with a ridge on it,
that slides up and down the hinge. It seems all it does is to make the
window more easier/harder to close when the bottom of window frame meets
the plastic. i.e. The more I slide it away from the window handle the
easier it is for the window to close.

That makes no sense whatsoever.

A picture tells a thousand words.
--
Regards,
Stuart.