Here, the challenge was to positon two parts and once at positon keep them stable in place with nanometer stability. The solution is to have two traversal arms gliding on air bearings that each carry air bearing linear sliders with a z-stage and an small rotation unit. With this setup the two parts to be positioned can be moved by joystick to the desired position. Upon releasing the air form the bearings the system stands very stable for a long time. All parts are bilatal coated. Assembly was completed in clean room conditions.