I was thinking of buying some jack pad support tools, in case I need the car lifted at a non-Tesla service location (e.g. after a tire blow-out). I'm finding two basic designs, each with slightly different materials or finishes. Basically, there are - Round ones with one post and a rubber o-ring to hold it in place. - Rectangular one with three posts and magnets to hold them in place. These seem to mimic the shape of the plastic jack pad cover. The round ones seem to be a lot less expensive, and are even offered as a set of four in a neat storage case for around $100. What are the advantages and disadvantages of each design. Does it even matter for occasional use?