As others have posted, I also like to use a 9" torpedo level. I like to think I'm getting a better idea of the general level-ness of the platter. My Galibier doesn't have this issue but I've had tables in the past where the platters are not flat. Some either had a convex or concave surface. This can be dealt with but it is much easier to do so when you know this condition exists before trying to level.
Many levels can also be checked for accuracy by flipping them over as opposed to turning 180. Either way gives the same indication of how accurate the level is.
Many levels can also be checked for accuracy by flipping them over as opposed to turning 180. Either way gives the same indication of how accurate the level is.