Consonants - The voiced alveolar lateral, /l/

[MPhonemicEnglish]

I like the way you describe the c mechanics very clearly.

[MPhonemicEnglish]

As a Standard American English learner / speaker since babyhood, I have always pronounce the Dark L and Clear L very well, but due to the fact that both sounds belonged to the same alphabetic character, I was kind of oblivious to the fact that they are two separate speech sounds with the Dark L actually being a pure vowel since it meets all the criteria of being a pure vowel. It's produced by the vocal chords. It exits the mouth. It can be sustained until you run out of breath and it remains the same sound from start to finish.
This Dark-L vowel just happens to put the tongue tip in near perfect position to snap downward and produce the Clear-L consonant sound, which abruptly changes the air-flow from tongue wrapping restricted to unrestricted. It seems that having a single alphabetic character is not a problem since we know to keep it dark if it isn't followed by a vowel. Well, actually, you can't go Clear-L unless you add a vowel.