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Another old-school pattern-transfer method uses double-sided adhesive tape to stick the paper pattern to the wood to be cut. This works great and does not discolor the wood.
Looks great, and I hope the green head doesn't split as it dries out. But, if it does, there's always epoxy and sawdust and dowels to fill in and reinforce the crack. besides that method, there's always the bowtie inlay joint from a contrasting dark-colored species of wood. Bet you could use your chisels to accomplish this in old-school style if you don't have the router guide templates for the bowtie.