Hello! I am a youngish and mechanically inclined newbie to machining. I have read and studied a lot, and have begun my hands on learning of machining with my HF 7x10 mini lathe. While I am fascinated with lathes and want to eventually become adept in utilizing this great tool, I do recognize that I am ultimately much more interested in mill work. However, I do not have the funds to get into the world of milling yet, so I want to make the most of what I have. I bought my mini lathe off of craigslist for somewhere around $250 a few years back. It was in pretty rough shape; surface rusted ways, the power feed did not work, no change gears were included, and the carriage and crossfeed slide had worlds of slop in them. I cleaned up the ways real good and it is now rust free, and with the help of the information on the mini lathe website, I was able to adjust the carriage and cross feed gibs so that everything moves fairly smoothly. But even after that, I was still getting a lot of chatter and chuck run-out, so I decided that changing the spindle bearings was in order. Since I was digging into it anyway, I decided to upgrade to tapered roller bearings. There is simply too much preload on my spindle bearings. At high speeds, the motor quickly (within 15 seconds) ramps the speed down quickly and then stops, and the chuck is very tight after I stop, for about 30 seconds until it cools down. I now know that I did not turn down the rear spindle spacer enough. It measures 31.64mm/1.2455", where I now know it should be more like 29.46mm/1.160". So I know I need to correct that. I worked from a couple different references for the bearing upgrade, but I notice now that I also overlooked part of step 62 of the arceuro guide - I must have missed where it said that "the outer spacers require a shoulder turning to clear the bearing cage" and the illustration points to the outer spacers located inside of the headstock. Did any of you that upgraded to the taper roller bearings do that? Thanks, any advice is greatly appreciated.