Good points and I understand. Just sayin that the zipper tech is avail. Most won't want to pay for it.
This kind of stuff is want makes me look for the very best avail. as I'm a bit tired of stuff not living up to it's billing.
It's either waterproof, or it is'nt.
Always a good discussion here at ADV. You guys are cool. Plenty of my thinking comes from 10 years in professional SCUBA. There is NO place in that world for "almost works". Dragging morons to the surface from 100 feet down with failing "stuff" will ram home that point in a hurry.