It's all a matter of whether you want one or want to spend your money or not.
All these gadgets and gizmo's work but there is always an alternative, what suits one person will not suit another.
I have my methods of turning light pulls which seems to differ from others but works for me.
I use whatever is on the lathe at the time whether it be drive centre or a chuck but I surely will not waste my hard earned on a fancy must have init?