One of the tables I play on fairly often has a roll out along one side. I have a machinists level and am willing to dive into trying to get it closer to level. It's an old enough table that the leg adjustments use the C spanner wrench rather than a large crescent wrench. One of the other players said you have to jack up the end before making an adjustment to the leg, which didn't sound like it's liable to be best practice, since you have to jack it up, then let it down, then jack it back up then ... It's sitting on concrete flooring and I can't come up with any reason why you wouldn't adjust with the table still sitting on the floor. What do the professionals think?