Yeah, its Foster who I've power trained and he is 27 now.
Its taken nearly 800 greens this time to get him the equivillent of around 60 'old' cones. Think it was around 550 last year so a big jump in the green packs, even putting age into consideration.
Im using all my pack farming to get greens so hope to have enough to keep power training him each season, but it may get to the point when he gets 30+ that is simply isnt worth doing.