Hi Jeremiah, yes, you need to provide entrance and exit sacrifice strips. Works like a backup board when drilling a hole, keeps the hole cut nice, same with the router bit. I've been using a 5/16" single flute, but you may be right a spiral downcut bit may be preferred.
Check your email, I responded to your address stored in my computer, not the private messenger. Matter of fact, to show how well it worked recently for me I put up two shots of the out-working, here they are again.
Hey thanks for raising the file size up to 40KB, makes a big difference, yahoo!
All Adi, can you tell?