Nice and welcome to the Nitrous Club
I think I'm the longest running tenured Z here on Nitrous with zero issues except a bad NMU at one point. Good luck, be careful and you will need other things when you go up in shot. I'd like to see more pics of where you tapped your nozzles to if your only using mad tubes.
It does get expensive to run nitrous. Especially out here on the island. I have bigger plans though for the future. Cheers