Wow, you've done a whole lot of work and quality work! I like the artistical rendition a lot! I'm giving yuo some instant reputation for that one alone.

I understand you want to rework your tectonics, so I will wait for that new version before I post any criticism (constructive criticism, of course). For now, make sure you think of plates movement in terms of a sphere.. I think that's a key advice. Welcome to the Guild