Optimized for load capacity and stiffness, mechanical systems employ strut-based mounting system that minimizes vibration and allows facilitated and precise (sub millimeter) position adjustment of hardware without adding stress or distortion. Strut mechanical positioner has up to 6 degrees of freedom: translational (X/Y/Z) and angular (pitch, roll, and yaw). While smallest design supports 200 lb, 6 struts provide solid (seismically adequate) support in all models.