I am curious. I am considering building a S&G Night Heron. What purpose does the upswept tail serve? What would be the ramifcations of lowering this "sweep" by 1". What about the front?
Look at this kayak:
See the more gentle sweep of the bow and stern?
I know the sherwater is more like this, but they don't come in 18'. Just random thoughts. I know less than nothing about kayak design.