After almost a month without connection to Internet in a travel, I'm happy to show you the new things I did.

I removed the idea of doing the internal structure of the greenhouse with methacrylate and I took a sheet of plastic from the point of recycling.

And, with this and a twisted piece of aluminum...

(Simple, to twist the aluminum, hit it with a hammer; to do the holes, use a soldering iron)

It will be, more or less, like this, but without the books.

I did too some holes in the aluminum box with the drill to be able of doing the structure and the supports. I put a cog attached to the aluminum of the top for the opening and closing system.

And, to finish this log, here is the cricuit in progress of the motor done with transistors, wire and plastic.