could I ask again the following?
Of course, glad to answer.
How central is the doctrine of the Trinity if it is not explicitly taught but at best implied? The concept of three coequal partners in the Godhead, is this clearly detected with the confines of the canon ?
I don't think a doctrine is necessarily more or less central by how clearly it seems stated in Scripture. I think all essential doctrines are stated clearly enough, so that with the help and affirmation of the Spirit, the text can be seen to teach them. I'm not into saying people that disagree with my particular doctrines are necessarily heretics, but I do believe there are an essential set of doctrines, although for me they are very broad. I think even that Scriptures clearly teach us some doctrines are hidden in Scripture for the sole purpose of seeking them out by revelation. I don't personally equate that with any Gnostic mysticism and secret knowledge, but rather a true and proper mysticism open to all who seek God.
I believe the Trinity is clearly set out within the confines of the canon alone; in fact, I think a man taking his Bible into the woods for a year and devoutly praying, would come out with this doctrine, had no one taught him a thing about it. In fact, myself not really coming from any strong church traditions, I don't feel particularly influenced or biased to believe a previous or established doctrine, but appreciate it when I come to the same conclusion that many othodox Christians have over the years.
The Trinity not being essential for salvation, I still find essential to deeply know God and very beneficial to relating to God, interpreting his Word and strengthening my personal faith in Scriptural truths. At one point I severely questioned my own belief in the Trinity due to it being something I was taught but had not been solidly founded in Scriptures. At that point, I held it in limbo, until I felt I could feel certain I had a solid Scriptural foundation for myself, and that it appropriately fit all the Scriptural data. At this point in time, I feel it overwhelmingly fits the data, and have incorporated it back into my beliefs with a deeper appreciation for the exegesis of those who went before me.
The most persuasive criticisms to me are not logical contradictions, but rather certain Biblical emphases, most notably the singular references to God saturated in Scripture. Secondly, that Christ often seemed to indicate himself on some level lower than God, expressing limitations, prayer, avowals of devotion towards God, an admission of true humanity and a separate identity. No other argument but these two really carries much weight with me. And despite the strength of these two arguments, the overwhelming support of the complete Biblical testimony and the constant affirmation in my own personal experiential walk, has completely solidified my faith in a Triune God, each of which participated in my salvation in a different, but essential and Divine role.
Bless.