Whether or not a consonant is in the beginning or end of the block and what the previous and next block is effect how a consonant is pronounced
Whether or not a vowel is below the first consonant or to the right of the first consonant in a tripartite syllable depends on the shape of the vowel and does not depend on the consonant
I believe that the final consonant in the tripartite syllable is always below the vowel with possible exceptions for ancient Korean or artistic Korean