Hydrozoan
Well-Known Member
Thanks for that reply and for the photographs. I too guessed that about 20kg/200 Newton would do for my lid, but have the additional problem that the locker cavity is not closed-sided, so I have to make up and fix a suitably strong mounting under the locker 'lip' - which is itself curved to form the drainage channel - whilst also bearing in mind your point about not putting any lateral force on the spring.