Dufwer/PA28,
I used a CRP1 to calculate the drift on the ground. In the air, for diversions, I just used a sensible estimate, and then used the 1/4-way method to make corrections. The max drift and 1/60 rule would have worked just as well, as would a number of other methods, but I wasn't told to use them and managed perfectly well without them.
This was last November, though, and I know that diversions have changed, or are about to change, not sure which - I had to my diversion under the hood, but I don't think that's the case any more. I don't think that affects calculation of drift, though.
FFF
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