Originally Posted by
Nobody
OMG, how did people ever mill anything in the 200+ years of metal working without the aid of computers???
Just forget it. It can never, ever be done manually. Forget that you can take the time to make it a compound cut, because it is just a straight slot, with a ramp up. Come on, a pump slot is shear rocket science and no one has ever gone into space, put a man (men) on the moon, or even gone great & vast distances without a computer. Call the boys and girls at Nasa, the Jet Propulsion laboratory, MIT, cause that **** is way to difficult to ever be figured out. Seriously...