Well i could not be able to complete this quest unless i brought him all the nine pieces one by one. So yes there can be something to it. And maybe that's why i'm thinking this quest as: MAIN QUEST, yes.
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Did you even read what I say? I stated that many times: you CAN'T complete the quest until you give him all 9 parts. Yes, that is. BUT: you can go in Aleroth after first trio of parts (3 different parts, not the same).
This quest can be considered as main quest, but just partially, since you don't need to collect all zeppelin parts.
