only complicated due to my extremely large radiator and confusion over a box of unlabeled pipes. Once the mock-up photos were posted, it made things very clear and the pipes went right in. The area of installation is tight and installing them with the other systems in place would be a challenge even if the pipes were an OEM design from Nissan.
I know you understand the benefits, my take home was that having actually driven with them, all puzzle challenges were worth it as my car is a very different animal now.