Deleted member 951
I think you will get a better cut with a double fluted spiral bit. I use one of these to cut the cockpits out of my kayaks and it's very neat and quick, I'm sure a standard router bit wouldn't work.
40-100-2 Steel Double Flute | Router Bits | Cutwel Ltd
You are probably right, but at that price, I will give it a try.
Thanks for the link.