i would have liked to put thi under the product review portion but am un able to because i am new. i felt this was a good second choice because it would pertain to a tip. has anyone ever replaced or placed a waterproof zipper on a piece of gear or had a tailor do it. i found a really great looking jacket with all the features i want except the reviews say it doesnt flow air that well. it is the teknic freestyle jacket and has exterior vents but there is a water proof liner beneath that does not breath. a easy solution to me seems to be cut the make a slice in the liner and use a water proof zipper sew it in and use the stuff for tent seems to water proof the seem. has anyone ever done anything like this or does this even sound like something that could work?