Should the anterior one third of the tongue rise on the roof of the mouth and touch the gums of the first four sets of teeth for the laam? And where exactly should the tip of the tongue hit? Should it hit the bump on the alveolar ridge or more behind?

Question
Assalamu alaykum ve rahmatullah,

May Allah reward you for your wonderful work.

I am confused about the definition of the articulation point of the letter Laam.

"It is articulated from the anterior one third of the sides of the tongue until the sides end at the tip, and what lies opposite to them of the gums of the two top front incisors, the two top lateral incisors, the two top canines, and the two top premolars.  The articulation of this letter is then in the shape of an arc, with both sides until the tongue ends at the tip meeting up with with gums of all the mentioned teeth."

Should the anterior one third of the tongue be rised on the roof of the mouth and touch the gums of the above mentioned teeth? And where exactly should the tip of the tongue hit? Should it hit the bump on the alveolar ridge or more behind?

Thank you very much. Jazakum Allahu Khayr.

Answer
Wa alaikum assalaam wa rahmatullahi wa barakatuh,
Jazakum Allahu khairan for your kind dua'.
Yes, the tongue rises up so that the anterior one-third of the sides of the tongue ending at the tip (including the tip) collide with the gums of the teeth mentioned in the definition.  The gums used are directly above where the teeth enters the gum.  The aveolar ridge is too far back from the mouth for this articulation point, instead it is right about where the tooth and gum meet. 
Please look at the link bleow.  It has drawings of the articulation points made by Ash-Sheikh Ayman Swayd, may Allah protect him and Sheikh Adel Abu Shi'r , may Allah reward them both.  After the pictures appear on your browser, you can click on it and they will be larger.  If you cannot read Arabic, number 5 is the laam, written similar to a 0 in Arabic.  Insha' Allah the drawing will help you see the articulation point better.
http://eld3wah.com/moaath/img/7roof.jpg

You are most welcome.  Wa assalaam alaikum.