Having fun this morning. Started a new project that required off center turning. The piece is 8x15x3 1/4". Fortunately I had modified my Powermatic 3520A so I could lower the bed. I built a tool.post extender. I also added 250 lbs of river gravel to the base and modified the controls so they are remote. I was able to crank this up to 250 rpm before it started to vibrate the lathe.