I would take the surface area of the first airleron and compare it to the surface area of the second. In this thread that would be 30" sq. vs. 40" sq. Or, the second airleron is 33% larger. You could consider cutting back the throw by 33% to adjust for this. However, there is no inboard airleron on the second one. Inboard is where the prop blast helps in roll. So perhaps there will be no adjustment needed.
If it were me, I'd have the same throw with a lower rate (on a switch) ready to hit in flight during the maden.