"Rusty_Hinge" wrote in message
. uk...


Sounds like lack of rigidity and overstrong winds is the problem.

If you can arrange it, try metal strip or angle-iron diagonal braces on
three sides. Well, two sides and an end.


These should have been built in to the original design.
If not - no wonder it is a shambles !

Regards
Pete
www.thecanalshop.com