If I did my hour with an instructor for revalidating my SEP class rating, learning something about aeros, do you think that would be enough to get grandfather rights?
Hmmm, let's see. Would the IAA/CAA/EASA consider part of a one hour flight with a random instructor, learning 'something about aeros', to be at least equivalent to a 5 hour approved course and the associated theoretical knowledge training? Tough call but my guess would be, errrr, possibly not.