Step 1: Choose the command pod you want to edit and open the Tinker Panel
Step 2: Click “Edit Hidden Properties” and open the XML editor
Step 3: Go to the “Command Pod” Tab and find the property labeled “activationGroupNames”
Step 4: Add as many Activation Groups as you want (1 comma = 1 Activation Group)
Step 4.5 (Optional): Go to the property activationGroupStates and delete all before applying (this will set all existing & new groups to off when you save and apply changes)
Step 5: Click “Save” and exit
Congrats! You now have more Activation Groups.
@XionmassResearchDevt @InherentUnstable a workaround i've found for the input issue is to set the part itself to the AG and the input to "FD.MachNumber>=0" which pretty much acts as an "always on" input, though this does not always work and may not be applicable in every situation, in which case you'll probably need to use vizzy or something