Hi, I'm debating on getting the 18" extension for our PM 3520 particularly with the idea of outboard turning piece of Norfolk Pine, which is plentiful here and often comes in diameters greater than 20". However, it's clear that one would not have the advantage of the tailstock to steady the big piece for roughing. Should I be concerned about that. Or is that not so much of an issue if the piece is mounted securely on a faceplate?