I created my curved portion by kerf cutting the back of a 2X6 and bending it to fit the 2x6 frame that I created. What I did was about every 1.5 to 2 inches I sawed half way through the 2x6. This allows the boards to bend and can be bent around the 2x6 frame that is constructed.
Take a look at my site. I have a few pictures of the front stage.
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