How do you level your turntable?

Pied,
I use the plinth because that's what the arm is mounted on, not the platter. Might not be the right train of thought, but it makes sense to me to level the surface that the arm is on. Example, say the platter is different from the plinth by a degree. Well, if you level the platter, now the plinth is off, and so is the arm. This could cause the arm to want to swing because it's off.

I also use just a bubble level on the plinth, and double-check it on the platter.

I have a few bubble levels
My smallest one has a magnet at the end is the mangnet bad when levelling your tt

buy some level of just a vial that has clear precision specs from manufacturer, usually from Japan, Europe, USA, Canada
Level the turntable, not the plinth. Ideally the tonearm headshell and turntable should be level.

04rdking,

good point, but, actually, ideally you want to level both the arm and the platter, neither of which might be aligned with the plinth.