Wooden Gymnastic Rings

I made these beautiful rings from roughly 20 plies of birch plywood (no, I didn't make the plywood from scratch). That is, a piece of 1/4" birch plywood sandwiched between two pieces of 1/2". The process goes roughly as such:
1. make 9" square blanks
2. glue and press them


3. cut the outer circle (bandsaw)


4. cut the inner circle (power drill and jigsaw)
5. light sanding inside (spindle sander) and outside (bench sander)
6. round over the edges (table router)
7. patch holes with wood filler
8. hand sand until the cows come home


9. 2 coats of spar varnish (working on this last step, I don't have a good place to dry them at the moment)