I noticed the difference between Hafs and Warsh when the letter "raa" is read. What part of the tongue is used when reading the letter "raa" with tarqeeq in Warsh?

Question
Title: Reading the letter "Raa" in warsh

Assalaamu aleikum
You mentioned that the letter "raa" is read by using the tip of the tongue. I also noticed the difference between Hafs and Warsh when the letter "raa" is read.
My question concerns reading the letter "raa" by the way of Warsh. What part of the tongue is used when reading the letter "raa" with tarqeeq in Warsh? In other words how should the tongue be positioned when reading "raa" with tarqeeq?
May Allah reward you

Wa salaamu aleikum

Answer
Wa alaikum assalaam wa rahmatullahi wa barakaatuh
The letter is articulated from the tip and the the top of the tip at the same time.  The specific articulation point does not vary from one way of recitation to the other.  They all use the same makhraj. 
The difference between Warsh and other recitations is that Warsh has more cases of tarqeeq.  We should use the same articulation point, but make sure the posterior part our tongue is not elevated towards the roof of the mouth. 
We can practice by reciting a word with tarqeeq of the , such as  , and get the feel for the sound and feel of the tongue with the tarqeeq, then practice saying it with a word Warsh reads with tarqeeq, but we read with tafkheem, and try to say it with tarqeeq, such as the in the two words : .    If we do this with several word combinations, insha' Allah the feel for the tarqeeq in a word we are used to saying with tafkheem will become clear and easier for us.
May Allah make it easy for all learning the riwaayah of Warsh.
May Allah reward you also.
Wa assalaam alaikum wa rahmatullah.