Hi,
that's really all?
Well, this you can di really easy by "tayloring", like
G01: Interviewer to bring the plate {if(Panel==1,"Product 1",if(Panel==2,"Product 2",Product 1"))} to the table from the kitchen/ room.
G02: Interviewer to bring the plate {if(Panel==1,"Product 4",if(Panel==2,"Product 1","Product 3"))} to the table from the kitchen/ room.
...
Worse alternative:
I wonder, why there is no order "G1,G2,G3,G4".
But by changing G2 and G1 we get this
Panel 1: G2,G4,G1,G3
Panel 2: G1,G2,G3,G4
Panel 3: G2,G3,G4,G1
Now, if you double groups G1 and G3 and order
G1a,G2,G3a,G4,G1b,G3b
you can display with these conditions
G1a: Panel==2
G2: all
G3a: Panel>1
G4: all
G1b: Panel !=2
G3b: Panel==1
Joffm
Volunteers are not paid.
Not because they are worthless, but because they are priceless