I have a 2015 mustang gt with the performance pack which doesn't come with a spare tire so there is nothing supporting the carpeted area in the trunk. If I put anything in my trunk at all, it will cave in which gets very annoying. It is annoying to the point where I don't even put anything in it. Does anyone have a solution as to what I should put in there so that it doesn't cave in anymore and my groceries dont get crushed? Anyone else have this problem too?