With the three hardwood pieces sanded thoroughly, we'll turn our attention to rounding over the edges of the three pieces of hardwood.
Set up a router in your router table with a 3/8" radius roundover bit equipped with a bearing tip. As we'll be rounding one half of each board at a time, adjust the depth of cut so that the bottom of the cutting head is just beneath table level. Check the cut with a piece of scrap stock.
When the depth is adjusted properly, route one edge of one of the circular pieces. Hold the piece securely against the table, and with the wood firmly against the bearing, smoothly route the stock in a semi-circular manner until the entire circle has been traversed. Then, flip the stock over and round over the opposite side.
Repeat the procedure with the other circle, then with the wind catcher.
After rounding over both sides of the three pieces, sand the rounded edges by hand with progressively finer grits of sandpaper until all three pieces are smooth.


