Size problems with masada backpack - FAB Defense Masada Bulletproof Tactical Backpack/Bulletproof Vest

Just received my Masada bulletproof backpack, it’s an excellent bag and well built. Unfortunately it’s not built for larger men. I’m 6’1” and 260 pounds. It’s hard to reach the straps that activate the system because they’re back behind my ears. I have large shoulders and a broad back a 48”chest and 36” waist. It just sits that way. Also at the bottom of the body armor where it Velcros to the sides, there isn’t enough Velcro there to attach it, Just a warning for the big fellows