In an opera production a 3D HDD projector was supposed to project images onto the stage during performances. Standing as it did on a trolley, which was to be moved over a tiled floor, the projector was virtually unusable. The problem was solved by combining an increase in the projector frame to 10 kg with the assembly of pneumatic levelling mounts of the type PLM-1. PLM, as part of the ACEolator family, is designed to operate in the low frequency range and is used primarily where perfect isolation of measurement tables, testing equipment and high-performance machines is required.