Thanks all,
Wing off tomorrow to make the repair easy.
I'm pretty sure it's good and solid, I gave it plenty with a screwdriver all the way up to the apex of the inner arch. Proper stabbed it because if I'm welding anything in I may as well be sure the rest is ok
Both Wings need a bit of fettling and painting anyway so were going to be removed soon, probably not for a while but this has sped the plan up a bit.
Al