I have ran lathes before in my younger years at a machine shop. I recently purchased a 1700lbs lathe and have had great success other than a few minor issues. One being that I can not for the life of me get all of the chatter out of my single point threading. I have the correct set up, my brother-in-law is a machinist...a good one, and he can’t figure it out either. So I’m guessing it is in my tooling at this point. Any advice is welcome, it is a stock lathe that bolted to the floor and leveled. Runout on both 3 and 4 jaw chucks are less than .0003. Stock tool post, Shars tool holders and tooling. I have adjusted spindle bearings, backlash and the gibs. I have a slight vibration in the lathe which I believe is coming from the fairly light base the machine comes with. Thought about bolting lathe to the wall with all thread for stability. Please advise.