When I make a quilted jacket I finish the seams as if I were working with doublecloth - I match and stitch jacket right side by machine; trim sewn seam and then fold the second side into place and slip stitch. Sleeve seams take extra fiddling but end result is rewarding.

I used the crystal zipper in a boiled wool jacket I made and found the crystals were hard to zip beccause of the weight of the wool. Your description of work was clear.