Firework Launch System.

My proposed firing menu.

**** Firework Firing Menu ****

Rockets >> Rockets Tier 1
Ground Rockets Tier 2 >>> Ready To Launch ? >>>> ARMED (Fire Button Used to Initiate Firing sequence)
Rockets Tier 3

**** Firework Firing Menu ****

Rockets Ground Group 1

Ground >> Ground Group 2 >>> Ready To Fire ? >>>> ARMED (Fire Button Used to Advance Firing sequence through cues)
Ground Group 3

I want to use the N button as a back/No button which will drop the menu back one step.