Hello, I'm looking to make a hooded jacket with synthetic fill. I have at the moment a McCalls pattern and I'm wondering if this will suffice or are there better patterns to work from? I'm also having troubles sourcing a couple of YKK #3, 36" open ended zippers for the vest I'm making and this jacket. If someone could point me in the right direction, I'm finding plenty of #5 zippers but no #3. Is this size zipper suitable as the main front zip or too small?