Today, after the scrap episode of yesterday(wrote of it on facebook), a new replacement part was waiting on me when I got to work. Now I had to bore that part to size. The tolerance is +(plus) or -(minus) .0003 of an inch. Your hair may be .003 thousands of an inch thick. So to get to the size I had to hold it to you would have to divide your hair 5 times to get to the total tolerance I had for that bore. Anyways the stress was biting into my neck and back. Each part I ran I checked, rechecked and then checked again and then said a prayer when I hit the green button. I got them done. Now I wait till the company who needs them uses them, will they press in as they are suppose to, or will they fall in(thats bad)? If they are lose or tight, is it my fault or did the engineer screw up? All in a days work.