A machinist works alone all day and wants some one to talk to but he can't stand people so he decides to get a parrot. He goes to the local Pet Store and they have two parrots. They look identical! One is $1500 and one is $300. He asks the pet store owner what the difference is since they look exactly alike. The pet store owner states that the $1500 parrot id flawless but the $300 parrot has a .015" flaw (hump) in it's beak. The machinist says "That is nothing, I have mics so I can just machine that .015" off and no one will know." The pet store owner tells him that may not work as sometimes there is a .002" hump in the membrane inside and if he takes the whole .015" off he will go into the membrane and kill the parrot. The machinist says, "I will just give it the .002" clearance and no one will see that, so just give me the $300 parrot"
Next day he comes storming into the pet store again and says "Give me the damn $1500 parrot!" Pet store owner says machined too far and killed it didn't you. Machinist says "No I crushed it's head in the vise!"
