I also went the same route as Modshack and put together my own kit. His DIY was actually my inspiration, although I did do some things differently and my Z is a NISMO. My DIY is in my signature as well.
I just changed my oil 2 days ago and inspected my install. There were no leaks, seeping, so soaking on any fittings or hoses. The hoses themselves are showing zero signs of wear and my oil temps have still been great. I just switched from Mobil 1 Synthetic to Red Line and things are even better
(Let it be from fresh oil or oil quality)