Hi everyone, I just bought a berghaus vulcan 4 cyclops 2 rucksack in size 2 . I am 5 feet 7 inches tall(170CM). I measured my back and according to the sizing I need size 4. How is this possible? I am a pretty short guy and according to the sizing, size 4 is for people that are 183 cm and over. I have not tried the rucksack on for a long ruck yet but it does not seem small. actually it is exactly the opposite, it feels it is a little bit large. Does anyone know where the hip belt on the bergaus vulcan 4 is supposed to sit? I have a crossfire DG slick 55 L and it feels like the Crossfire sits higher than the vulcan, do you think that it is because of the different styles of back system?