i have just started going TBC myself and love it. i finally got a good dead center for my lathe and gave it a try. i do believe i will now mothball most of my mandrels and just run between centers. much more sturdy, more accurate, easier to set up, etc. do not have any real TBC bushings yet so i have to use my regular bushings. have had a couple that would not work, that is why i have to keep at least a few mandrels, but most have dialed in very well ( i put the indicator on each one i put on the lathe). i also think they help me with getting my diameters correct on each blank. working one blank at a time makes you concentrate a little more in my opinion. have turned and finished about 10 pens in the last 3-4 days, mostly cigars, and all have come out with very good fit with no having to re-turn or build up with ca finish to correct.
i believe that is the way most of my work will be done from now on. JohnnyCNC bushing will be ordered.