Yet another backpack mod this time with backpack you can place in world, color in different color combinations, upgrade with more inventory and enhance with many functional upgrades
Fixed issue where tank / battery upgrades could be swapped for stack upgrades making the resulting capacity less than their contents and break rendering. Trying this will now show an error message.
Fixed backpack to just close gui instead of crashing out of world if player happens to press backpack open key at the same time they click the backpack out of slot causing client not having the backpack in slot when server had it and already started opening gui