If ر has shaddah, should it be full mouthed, or empty mouthed, because a full mouthed ر with shaddah feels a bit heavy.
Wa alikom asslam,
The ر with shaddah, will not necessarily be full- or empty- mouth by default if it has shaddah, it depends on the vowel on the Ra and the vowel the comes before it .. This concept is explained in much more details in this online lesson: https://www.youtube.com/watch?v=-Uc5vkrTYnU
Allah knows best.