Card Rulings talk:Black Dragon's Chick

I am revising my red eyes deck because i recently got majestic red dragon. I forsee the following situation:

on field: Red Dragon Archfiend, red eyes b. chick

in hand: majestic dragon, red-eyes B. dragon

i then synchro summon majestic red dragon with majestic dragon + RDA + REBC, but then wouldnt that trigger REBC's effect such that i can also special summon REBD from my hand?

or does the use of chick as synchro summon material mean that its used as a cost already, and cannot be used to summon REBD as well?

in addition to the obvious synchro options i also run dragons mirror targeting 5 head

Mark