Quote Originally Posted by Ricardoco View Post
Maybe the 4 buckets full of water and connected by pipes sort of thing. Any thoughts???
A customer in the US used pretty much this set up to level the jigs and platforms they built their aeroplanes on.

We used ultrasonics to measure the level of 'water' in the connected 'buckets' to within a couple of mm, hydraulics did the actual movement. Why go to all this trouble? If nothing else, gravity can assist in measuring precise angles.