Nitrous plumbing A1A...??..

The NOS jets I had were all marked with a number. The front of the jets are all the same size, backs are the actual size, thats normal. So if you go with say 25n jets and 20f jets @5>6psi to be still a bit fat that should be around a 120 shot?. Much less and I doubt if you'd notice it too much. Race only a 125 shot was worth around .4>.5 in ET on my junk but I was well fat on the tune.
My goal is to have a safe operational system.. not only safe for me, but safe for the engine.. kind of like you're saying creep up on the tune and creep up on the amount that I use.. getting all the components linked together with all their electrical connections and triggers and arming devices... I'm already imagining a second switch panel just for operating all the different ways I want things wired up..