I've been throwing on and off for a few years, and I just recently bought a new brent wheel. I've certainly been able to center and successfully throw basic forms, but for some reason I've been having trouble consistently getting pieces centered and don't know if its me or the wheel. I seem to encounter the most problems when trying to open. I get it seemingly centered, and then as soon as I begin to open up it goes off center. I've tried opening several different ways and it always gets off center. I don't know if its the wheel, or if the clay isn't totally centered before opening, or if I'm opening incorrectly.
Also, does anyone of of a fool-proof way of making sure the lump of clay is perfectly centered before opening. I go by sight and feel, but perhaps there is more exacting method.