Hi Dave,
Yes, I have looked at this Unitarian teachingl, and I have participated in a Christadelphian site as well where the same argument was offered.
I wasn’t using Christ’s statement in an attempt to show that Jesus was the Great “I AM”. I was using it only in the sense of “Before Abraham, I was.” If Jesus WAS before Abraham, then He must have existed before his birth. For Him to have pre-existed, doesn’t imply that He was God Himself, but it does agree with the fact that He is the Son of God, and agrees with the early Christian teaching that He was begotten by God before all ages. That is different from his having been begotten in the womb of Mary his mother. The latter only indicates his beginning as a human being.
My position is that, as the Son of God who was begotten as the first of God’s acts, Jesus was fully divine, and thus another divine Individual, different from God the Father, but just as divine, because He is God’s Son. When people beget offspring, they are human like their parents. When God begets offspring (He begat only One), that offspring is divine like Himself.
Notwithstanding, I am a (small “u”) unitarian, as was Jesus Himself, who addressed his Father as “the only true God” (John 17:3). Jesus, although equally divine with the Father, was not God Himself. Yet, because of his divinity He can be called “God” in the sense of his essence, as John used the word in John 1:1 where he wrote that the Logos (the son of God) was God, or as the grammar allows, "The Logos was God-stuff (or God-essence).