Just bought a dry kit, have some questions.

Ok guys I just bought a dry kit. (its just a base kit). Well instead of me holding down the button, can I just get a WOT sensor and then a window switch to tell it what rpm's to spray in?? I want to be able to flick a switch to arm it, push a button to purge it, and when I'm at WOT I want it to do the rest of the work. Is it that simple??

Thank you guys for all your help, I really appreciate yalls help.