Alpha Texan Tuning Doctor Service. Alpha is a tuning service for the Airforce Texan only. Return Shipping is FREE to the lower 48 states, Alaska and Hawaii will be additional shipping. This service is only good for USA, no international sales for this service is available at this time. Warning, never use oil base lubircants on your air system. Tabris17 on www.pbnation.com recommends to only use 100% pure silcone base grease for your threads.