Are you allowed to adjust the height of the tee at a showcase and if so would there be an optimal height ? Not sure if it would make of a difference. But if you can squeeze anything out of a small adjustment to the tee height seems worth it . Is it their natural swing height, a high meaty fastball height or something low ( I've read some of the highest exit velos are ground ball hits) . I know they want to make solid contact. So we will say all of the choices involve solid contact.