I am picking up some Ash to rip gunwales as well. 14' for my 13' canoe. My question concerns the grain. Should the top of the board surface end up being the outer edge of the gunwale? Could someone please explain the best way to utilize the grain of the wood? Also, what are common width and height dimensions of gunwales? More vertical? Horizontal? I would think square-ish would be easiest to work with for the purpose of flexibility in both dimensions.