What has been the most exciting thing to happen with the ‘new’ rover hardware?

Question: What has been the most exciting thing to happen with the 'new' rover hardware?
- Keywords:
  exciting,
  hardware,
  rover
Asked by 488aerf23 to Chris on 13 Jun 2016.
- Chris Hackett answered on 13 Jun 2016:
  
  Its always exciting to get new hardware, receiving a new test bench was exciting as we get to test it out and set it up. Eventually we will get the whole rover and we will have to set it up and test it too, which will be awesome.

Question: What has been the most exciting thing to happen with the 'new' rover hardware?