Sanding after the jigsaw is a good idea and might have prevented the problem I had with the router on a headstock. The bit caught on an bit of a rough spot, and broke off a chunk of wood that hit me in the chest. Still, done carefully the router is probably a better way to go, particularly if you want to repeat on other headstocks.
It occurred to me while I was using the drum-ander-on-drill-press that it might be a better way to finish up router templates than the way I've done it in the past ;-)