Dave that is exactly what I did. Set up the snap switch to the recommended deflections for the model (Suzuki Hybird) flew with the switch and confirmed throws and now have set up the snap condition AFRs to same percentages as the snap program settings. Haven't measured the actual deflections yet but according to the servo monitor screen actuating the snap condition using the sticks gives the same deflection as the snap program off the switch.
Interestingly if you don't disarm the snap switch and actuate it and the sticks at the same time, the deflections appear additive and could potentially overdrive the servo (or your linkages if you have set a maximum deflection on the travel screen).
Malcolm