My wife, bless her, bought me a Pit Bull lift for Christmas. It is equipped with the optional turntable and it has the air over hydraulic jack. I don't have a compressor, and all sales are final. Can anyone suggest an inexpensive compressor that can operate the lift? Are tie downs required with the Pit Bull? Can one or both wheels be removed safely while the bike is on the lift? I have never used a lift before, and with all the holiday activity I haven't been able to get to the garage to examine my present.