I am wanting to find a way to mount an aerator on the back of one of my mowers utilizing 3 mounting points - 2 hinges & 1 cylinder. It will need to have good down pressure as well so it can still get good cores. I just don't know anything about the mechanics of getting it to move up & down & what I would want to use to make it happen. I would like to stay away from hydraulics since it will be used in a lawn & they are harder to mount w/o any leaks. A little advice would be greatly appreciated!