We have modified the standard turbine 4-hole system by removing the useless water bottle and rerouting the air system. Additionally, the proper connection pieces for the compressor have been fitted to the intake hose using the 1/4 M and 1/4 F hose barb and compressor quick disconnect. Each system is then tested before shipment. We recommend the California Air Tools 1.0 Gal. Light and Quiet Air Compressor, Model 1P1060SP. Available on Amazon and most hardware stores.