I'm still fairly new to alot of costuming techniques, building etc. I know almost everyone uses the dremel to cut out the visor area of your helmet, and I've figured out that I need a Flex shaft. My question is, has anyone tried the cutting bits? Like a drill bit but you can move them side to side to out material like sheet rock, etc. I think they may be called a twist bit? Any info would be greatly appreaciated!