The Pendulum Vertical Chest Press is a unique machine. An athlete who trains exclusively on the Vertical Chest will achieve the same results or better than a free weight bench press. Assistive devices like repboards and bench press boards are totally unnecessary. The Pendulum has built in range limiters (set extension technology) that quickly can be changed to do drop sets or limit the range of motion.
To elicit shoulder relief and isolate the chest, particularly for rehabilitation just raise the seat height up several notches. To maximize anterior shoulder power line the upper arm parallel with the work arm of the machine as shown in the upper photo.
Independent work arms correct strength deficits allowing the athlete to augment their training by exercising one limb at a time. If you want tremendous chest power, Get Strong on the Vertical Chest Press.