Share 'Advice on making a wooden banjo ring.... of sorts....LOL'

I am making a  banjo of sorts to give to my local VW bug club to use in their silent auction.  All the money goes to local children's cancer charity " Buggn' for a Cure". Any way I made the body out of 3/4 oak ply (used for cabinets).  Cut into a 14" circle using my rotozip and sanded to finish it off.  The back I will mount an early VW hubcap that I made a channel to mount the hubcap in.  The f…