this is the way i build em and if you've got another way then share it here
First up the material used is 0.1mm brass sheet this isn't the norm but you will need to guage the thickness for your own needs
the bigger the hatches/door the thicker the sheet and tube/rod
next is to measure the hinge to be replaced
then look at the original and see what it looks like and what type your going to build (this one has a 3 position hinge similar to a door hinge)
measure the hinge and transfer it to the brass sheet and cut out the strip you'll need two strips for one hinge
fold the strip around your rod/tube and clamp firmly with pliers creating the nice round head
More to follow
