I started making 2.875" x .875" slotters w/ 1.250", shank this was one of the weirdest setups i've ever done. My boss had me use a piece of crap spacer for indexing the part. it took about a day to prove the program out and run one side, my programer told me to do one pocket at a time on all the slotters. So when we switched to the other side we can move offsets and ease in to it. When we switched from the back pockets to the front pockets we had to put in whole new offsets and prove it out yet again. and some how i didnt move my Y in enough and could've swore up and down that i did but they came out 2.940" instead of 2.875" like the back pockets. but the TIR from the back pocket to back pocket was about .002" and front to front was about .003" from back to front was between .025" - .030" depending on the pocket. I had made about 10 on the manual lathe and then we swithed over to the cnc to finish them and now all but 1 are scrap and theres not a damn thing to can do to save them.