Like Lazerjock , I suggest wearing the harness under the vest and closing the vest up tight. This will determine if your vest is too wide along the shoulders which could explain the bunching up. Your vest sleeves also look like they're a tad too long. The top corners of your shoulder armor are...
What were your settings and type of studio lights used for photographing the jetpack with the beacon light on? Typically, the significantly higher power of a studio strobe would 'override' any bulb even at low power. Hence it would be ideal to do the shot in complete darkness and drag the...
Seriously, that shirt is horrible.
Collar armor does not attach over the back armor.
His jetpack seems to be attached directly to the back armor instead of scuba harness.
Notice the Cylon style animation on the top row of his chest display?