Do you have a fence for your router? If so, use it with a curved piece that
matches the curve of the arch. Use it to follow the curve of the arch, in
incremental cuts. Slow down the router, if you can. Good luck.

Steve

"tom" wrote in message
oups.com...
It's possible, but I think it'll get a little scary at the ends of your
stock, without both fences in play. Maybe rough cut the stock extra
long/wide to avoid the teetering, and give your fingers some extra
room? Is there a bearing somewhere on this bit? Tom