While work on the shims continues, one of the fuel tank mass simulators was set in place to test for fit and alignment. All of the mass simulators will be mounted for vibration testing later this month. These simulators will represent the masses of the fuel and oxidizer tanks, thrusters, avionics, payloads, and rover during testing of the lander structure.
The video below shows the mass simulators being manufactured at Atomatic.
The fuel tank mass simulator in place on the lander deck
The mass simulators laid out
A CAD rendering of the lander structure fitted with all of the mass simulators