New forum member here. Thanks for this. I was reading one of Ken's posts and was totally lost in the acronyms. This will help. I have had my T-4 for perhaps 10 years and have used it once. I have decided to turn more and I need to invest more time and effort in learning how to use this system. The manuals are extremely well written but remain OVERWHELMING. The learning curve is steep. I look forward to lots of reading.