I am a regular mandrel guy for most of my turning, have been for 20+ years. Some between centers. I like the idea of this more than anything I have seen, myself, to be able to shorten the mandrel when needed. I like the live center, and still do not believe that 'misaligned' tailstock (minor misalignment) causes issues. Someone mentioned above about the ends being square, I think this gives more trouble than we think for many.Jim, I remember a few months ago that you wrote you didn't want to have to learn anything new. Did you change your mind? There is a more accurate way, and much more simple with less complications. It's not that one has to learn anything new, it is that one just needs to "unlearn" complicated things.
If you do not want to use a mandrel saver type of live center in the tail stock, here is a Whiteside that does NOT use that type of tail stock:
Gone are the days of off-centered turnings and the need for spacers for those shorter projects. The Whiteside Pro Pen Mandrel system incorporates similar technology used on today’s most modern CNC machines. This technology allows for a superior hold on the mandrel, while providing quick, easy...www.woodcraft.com
Whiteside makes top of the line router bits. Their machining is excellent.