Diablo chip confussion.
 

I just installed my Diablo chip, everything went fine. I just have a question. The instructions state that I need to have the key in the off position to change settings. However I have read in this forum that you can change settings on the fly. Who's correct ?

3 stage: you can switch between the two power settings on the fly. You must turn off the vehicle to switch between a power setting and stock.
2 stage: you must turn off the vehicle to switch between a power setting and stock. If you add a 3rd stage you can switch between the two power settings on the fly.