Ok I'm about ready to order my first rod to build for my father in law. Going to be a December gift so I have time to do this right. Going to me a light crank rod. Thinking of getting the North fork sm-cb-661-1. Specs say tip is 4.3. So when ordering the tip I can't tell what to choose. Can someone break down the pic and inform me which number to look for? Also I don't see anywhere for the number of guides and spacing. Is there a formula? Also everyone has butt dia listed so how do you know what size handle, seat, and fore grip to order?