Homebrew PCBs

hi,


Does anyone use those milling bits to cut out boards? The ones with the  
diamond pattern all over the business end which look otherwise just like  
PCB drills.

If this works well then i can wait until i have my CNC and use the  
sheetmetal shears until then, otherwise i must make a shaft for that  
carbide saw somehow. Pretty hard to do without lathe and the last attempt  
was a bit too much out of round.

I'm worried about the huge amount of material that is milled away,  
wouldn't that dull the bit quickly?

ST