Fly Zipper Insertion Help

Word has it that Sandra Betzina's fly zipper tutorial is the bomb. I have the directions in her book and use those but I thought a video might help clarify things. Her video on Threads.

Here is a video by Fashion Sewing Blog on the fly zipper. It is a very good video that is easy to follow:

Here are a few other illustrations or tutorials:

Oliver and S fly front instructions.

Power Sewing Step-by-Step by Sandra Betzina, page 62.

Pants for Real People, Palmer and Alto, page 106.

Making Perfect Pants from New Mexico State University has a nice little chart with body measurements, ease, pattern measurements and the difference. Nice little way to come up with the amounts to alter.