The requirements of magic angle spinning at very high spinning rates (> 100 kHz) lead to miniaturization of air bearing systems and turbines. The basic principles of gas turbines and bearing systems need to be adapted to the sub-mm range of dimensions, requiring novel manufacturing techniques for rotors, turbine caps, drive systems, and air bearings with an outstanding precision. For the user of such systems, new challenges of sample preparation and rotor handling arise. Automatic and semi-automatic regulation of air flow for sub-mm MAS systems must be addressed.