I'd like to take a moment to complain about stainless steel.

1.) do Not order your SS shear cut, pay extra for plasma, laser, or waterjet cut. You'll lose 2 hours, and a good 1/8" (at least) to milling it flat

2.) if it screeches while cutting, you've work hardened the SS, and need to increase spindle speed, decrease the chip load and maybe decrease the feed rate. listen for buzzing like a bee hive - that's a happy endmill in 304 SS

3.) did I mention not ordering shear cut?

4.) screeching will happen.

f***!!