Wow, Richard, awesome data! My only gripe with the MTI Livery is lack of pockets. I need survival and misc gear in my PFD - firestarting kit, knife, whistle, camera, and a snack. So, I like PFD's with pockets. And my paddling smocks (a Patagonia Specter pullover in mild weather and an NRS Endurance Splash Top in cooler weather) have kangaroo pockets - I wear these when using the SOS or TorsoLite as my PFD.
But, at 0.9lbs it would almost be worth adding two external front pockets.