A Dremel is sending a boy to do a man's job where most engine work is concerned. My 22K RPM electric die grinder that uses 1/4" shank tooling would get the job done quickly and accurately, though. You're welcome to share those pics with your high-priced "machinist" if you choose to do so!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!