Progressive Nitrous systems....

I had great luck with the NOS mini. It's cheap, easy to program with the handheld remote (once you go through it a couple times), and can do a lot for it's inexpensive price. Pretty much anything someone with a single plate kit could want, even make a single kit mimic 2 stages (had fun playing with that). Plus, it doesn't suffer from emf issues as much as some of the more advanced controllers. Tried and true (though older) product that works.

If you have to pedal with the mini does it restart the ramp or just shut the nitrous off for the run?