Redesign the step master to include working out the upper body (New Design) at the same time you work out the lower body (existing machine).

It has two options for working out your upper body:

Option 1) From pulling, will work out the arms biceps/tripceps, shoulders and chest (just about a complete upper body workout in combination with lower body (legs/gluteus/calves).

Option 2) Side lower/pulling (in combination with the step); will workout the abdominal midsection (low/upper abs, love handles), shoulders/arms including your trapezius and shoulder blades.