By combining the 3 major components of the backpack, the harness, waist belt and the back panel the joint mock up has been completed. As we moved the position of the pads from the shoulders to between the shoulder blades, even with the harness tightened we need to maintain the breathing space from the back panel of the bag to the person carrying it. This is where a new problem emerged, this time with the harness. Due to replacement of the fabric and change to the design the form of the backpack has changed. When the harness is tightened with the belt to closely hug the persons back, the harness at the chest area became bent and no longer a good fit. So we took this lesson and went back to the drawing board one more time to create our next mock up!