In a couple weeks our plan is to take the Model 3 to buy some of that awesome flat packed furniture that takes an afternoon to put together. My worry isn't about the overall weight (2 back seat passengers would weight as much the cargo we are buying). Since they are long heavy packages, my worry is more about the pressure that is being put on the back seats that are folded down. I've seen other car back seats that have been ruined (or at least bent) due to too much cargo on them. Anyone have experience loading heavy stuff on the folded back seat?