Any feedback on how the new zipper has held up? The main zipper pull on my A4 had problems a year ago or so and a cobbler popped on a new #5 'locker' for me. It began to fail this fall already and i had someone else repress the pull. I started wearing the A4 in winter this year and it started to fail again almost immediately. I'm taking it in to have an estimate tomorrow. I'm thinking a metal #8 would be enough, but wondering about pros/cons of a #10...?