Per the question of Alternative Kaita fusions, I believe that is has been stated somewhere that any fusion is possible, provided it conforms to the rules of a Kaita. BS01 says, "A Toa Kaita is a being formed by the melding of the bodies and minds of three Toa of different elements...All Toa have the capacity to form into Kaita. The combination of three Toa also results in a new Kanohi, which contains the powers of all three Kanohi used in the formation. Each Toa Kaita is a separate entity from the next, and each is bestowed a unique name and title."
So, by that logic, any combination of three Toa--provided that they are of different elements--is possible.
Anyway, these are excellent combinations. I prefer the Gali/Pohatu/Onua combo (something about the symmetry and color blocking really appeals to me), but both are very well-constructed, and look like they could have been combination models of their own. I'd like to see more combinations from you! Nice work!