I made strip blades that were glassed and edged with a poly small rope epoxied into the edge. The closet pole gets a cut out on each end with a small curve to form a cupping of the paddle. In other words half of the pole is cut away and you would taper the cut up to a gentle curve. The shaft end travels about 3/4 up the blades. They gat a fillet around the shaft on to the blades and I sculpt them in to an almost flat and soft curve on the backside of the paddle. To clamp them I used pieces of 3/4 x 3/4 wood with threaded rod and wing nuts through the ends that bridge across the blade and shaft ends. 4 of them will do a blade.

Feathering is personal. If you want a 70 degree, you would mark a straight line on one end and use a protractor to get the other end marked. It can get confusing as far as right or left handed paddle. It helps if you have a commercial or a borrowed on to follow to keep your sanity. My blades were symetrical which solves that but the feathering has to be correct. You can also by a 2-piece furrel and do it that way. Making blades and attacing them to a shaft can make a strong and beautiful paddle. If you want to do a complete glue up and carving that's up to you. I paddle mostly Greenland style now and I converted a few of my regular paddles to unfeathered. I personally find no need what-so-ever for feathering.

1/4" strip blades are very strong. I used 6 oz. cloth and filled the weave on both sides. CLC shows a primitive similar way to make plywood ones. But if you do some blending and shaping, and make strip blades, you can make really nice looking ones with a closet pole. In the US there's two size closet poles. You want the smaller of the two.