(possibly silly) question about APR 100 octane program

Hi everyone,

Been tuned for a year so I figure it's time to try out the 100 octane program on the 'ol GTI (stage 2).
So I guess I'll run the tank until almost empty and put in a few gallons of the hard stuff.
Here's my question; once I've added the 100, should I switch programs right away or drive for a few miles then change programs?
Or does it not matter?

Thanks guys

Get as low as possible, drive for a min or until you feel a lack of power and then switch.

As long as your injectors are putting out 100 octane, its fine. If its injecting the last of the 91, you may experience lean or funny behavior. Do water meth