I missed the PBS show Last night, but I did see the one on Saturday. It's true that these rovers weigh 50% more the Last ones. The big problem that they had to overcome was that they had to fit them into the same sized capsules, which meant they had to figure out how to fold them up for transport, and unfold them on landing. They had to rework both the airbag and the parachute designs. So far, it looks as though it worked.
