slimboyfat, in your post above you quoted from the book King and Messiah as Son of God: Divine, Human, and Angelic Messianic Figures in Biblical and Related Literature (p.203) which says :
In Revelation the evidence suggests that he is God’s first creature, namely, the principle angel.
Part of that evidence is Revelation 10:1 which refers to "a strong angel descending from heaven, arrayed with a cloud, and a rainbow was upon his head, and his face was like the sun, and his legs were like pillars of fire", who had an opened scroll (cp. Revelation 5:5,9).
Did the scribe of codex Sinaiticus understand that Revelation 10:1 referred to Jesus a.k.a. the Son of Man?
Whereas the reading should be "and a rainbow was upon his head..." (και hη ιρις επι της κεφαλης αυτου...), the scribe of codex Sinaiticus changed this to read "and hair was on his head..." (καὶ hἡ θρὶξ ἐπὶ τῆς κεφαλῆς αὐτοῦ...).
Juan Hernández writes regarding this (p.110), thatIt is likely that the replacement of ‘rainbow’ with ‘hair’ is a harmonization to Revelation [1:13-15], where the glorified Son of Man is also described as having ‘hair’, αἱ τρίχες. The fact that various characteristics of the Strong Angel already echo those of the Son of Man increases the likelihood that the change is meant to draw the two even closer. To this we might add that there was already an exegetical tradition in place that equated the two figures. Victorinus of Pettau (in the third century) and Tyconius (in the fourth) assert that the Strong Angel was in fact the Son of Man.