But you prefer that your inventory is always elastic greater the weight you carry, here's a plummet of 500 Kg xD

Rubber Inventory is a modification of the carrying system. Now the inventory will be elastic, so that carrying capacity will always be identical to the total weight of the inventory.

In case you prefer more or less than 500 kg on your sinker. You can choose from 1, 50, 500 or 5000 kg