WIP 5

So, those drawings are somethings I still need.

I'm really stuck now, and I don't know how am I suppose to do those :c
I'm lost...

If you would have some tutorials, parts, models, or anything that would have something usefull, I would be more than happy D:
I would be SUPER happy.

So, any ideas?

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(From the last picture, I have only edited the textures a little)