10/9/2015: It is crucial that all Arc Trainers leveling feet are adjusted when the machine is installed or moved. The following procedure will level the unit by evenly adjusting the weight on the rear feet. Leveling the unit will eliminate rocking during use.
See the Leveling SPARC Trainer Procedure from the Cybex 50A1 Sparc Service Manual
Cybex, Hammer Strength HD Sparc Leveling Unit
