Tank Upgrade causes Inventory to become disorganized.

[PaterFrog]

I don't walk around with the tank upgrade already slotted, because I don't always need it and reserve the space for more blocks instead.

However when I do end up using this upgrade, it replaces backpack slots in such a way that it sequentially shifts each line of slots two to the right, adding up to a diagonal rainbow of what was once nicely ordered memorized slots.

This is quite annoying - please change the handling such that the inventory slots reserved for the tank still exists as far as the slot arrangement goes, but are simply unusable. You'll notice that the bottom row is actually extending into the inventory now, see the diamond pickaxe memory slot for example.