The RS7 is with 0.40 shims perfect for 25% nitro at sea level and also for 16% by 300m above sea level.
If they drive with 16% at sea level they can drive so, or can put 0.05 shim out maximum 0.10 so they have with 16% nearly the same power as with 25%
Hmmm...... something looks wrong to me....
Normally the higher from sea level the lower the head clearance or the more nitro you have to run. Your answer is telling otherwise......