gents..... and ladies, where is the center of gravity point for lifting and changing out the 2 tires? and any precautions as to shimming, so that I do not damage anything. I still plan to "hang" it from the celing of the garage.....I have a chainfall set up, but plan to use that for extra security only......I don't want my baby to FALL...:no-no-no:............thanks in advance JOHN