I got my M head cleaned repainted and assembled. I have a question about the spindle I bought some import collets on ebay and a ER32 to B&S no.07 chuck I am getting some serious runout with both. After cleaning the taper I get .0015 with a .5 gauge pin in a 1/2 inch collet and the same when I use the ER32 chuck with the 1/2 inch gauge pin again. I put an indicator just inside the spindle and get less than .00025 So do I need to have the spindle reground? Is that even an option?