A circuit generally comprising an interface circuit and an arbitration circuit is disclosed. An opening is formed in the pressure cap. The drive train includes a first stage carrier connected to the rotor hub. The invention is characterized in that the filling hole is aligned with the extraction hole. Tracer messages are detected and discarded within loops. The invention also provides pharmaceutical compositions comprising the crystalline freebase or prepared using the crystalline freebases; processes and intermediates for preparing the crystalline freebases; and methods of using the crystalline freebases to treat a pulmonary disorder.