That's a good question. My reasoning is to use the CNC for accuracy. I'm skeptical this bit will hold up, though. If it doesn't, I am brainstorming a slitting saw rig instead -- but i wanted to give the bits a test to see if my concerns were really needed. I'm not sure how many slots this thing will cut before it snaps ... we'll see!
I kinda want it to fail badly because i'm geekin' about this slitting saw rig I've been contemplating