hello everyone i'm goign to purchase the profilux controller but just want to get a couple of things straight! i am going to get the profilux 2 Ex beginner package and i am wondering if i can jsut pruchase the probes for redox and conductivity or do i need to purchase the cards as well? is the elite package a better way to go for saving money? i need the wlan and need a bunch of other stuff so need some help thanks!