The art and science of building fly rods that work well has long fascinated me; no matter what materials are used for the rod stock or other components or whatever the intended use of the gear, to make a fly rod work on the water there’s a lot more science and very intentional, behind the scenes craft work than is ever pondered by most of us.
Here’s a great piece on Renato Vitalini and his V-Stick Custom Rods via CTS.