I just completed my 15th Greenland paddle. This one is 100% carbon fiber, weighs only 19 ounces, has the same amount of flex as Sitka spruce, and with foam plug silencers is as quiet as wood. It is the 4th composite paddle I've built, and I've gone through the whole "from plug, to mold, to paddle" sequence three times, so building composite GP's is not a fluke. The material cost isn't cheap with the three yards of 50" wide carbon fiber used to build the paddle costing $175. Regardless, it's a fun project that results in a lightweight and rugged paddle. At the link below I've updated the instructions for building the paddle with more details and tips, and better photos.