Rich, that looks fine, i wouldnt do anything different to that, other than possibly mount the injector an inch or two closer to the IC, frankly it makes a refreshing change to see pictures from one of the companies that actually know what they are doing with nitrous!
There are SO many bad instalations out there, and there is no excuse for it really cause its such a simple thing to get the basics right like not having 3 foot long delivery pipes etc, but companies still do it!

But nitrous solutions do have a very good name indeed anyway.