I had a boss at a race shop many years ago get mad at me because we got a new style fluid pump in that was supposed to be the greatest thing since sliced bread and I immediately took it apart before installing it on the car. My thinking was two fold. First was that I didn't want anything on the car that I didn't know exactly how it worked and what parts it was made of. This gives me knowledge "down the road" if something fails. Secondarily, I wanted to know that I had checked every bolt and piece to make sure it was done correctly. I tell you, it is something I still do and you may be surprised how many times something is not quite right or can be improved upon. My wife thinks I am crazy too. "You paid how much for that and you are cutting and grinding on it?" If I had a dollar for every time she said that!

Point is, I think it is good habit to CHECK EVERYTHING, even if it is "new".