Do you have a preference for a particular knot shape? As far as I can tell, fan shaped knots have a greater top surface area because the knot is shaped with all hairs extending to the full loft, whereas bulb knots are constructed with the center hairs at the full height and the outer circumference tapering down to a shorter height. Is this correct? What actual difference in performance or feel do they have? Am I right in guessing the fan shaped knot is the older construction method because it requires less time and skill than producing a bulbed knot?