Okay thanks. I‘m not sure if I understand this upselling-method right:

There is player A and Player B. Player A is 6 Managerlevels higher than player B.
Then Player B trains a player to 160% with whith Skills above 300% (for example shooting). Then Player B sells this player to Player A. For Player A it is not a 160% player, but only a 40% player (-6*20%). This 40% player has still 180% shooting but a lot of other skills are below 1%. Now Player A can train the player again and achieves very very high white skills (above 400%)
Is that right? sounds very expensive