Well, ICRDesign, I´m happy that you liked my comments, but, in fact you deserve them all ! I really think this project rocks, its unique in various aspects.
Answering your questions, I´m from Santo Andre city, Sao Paulo state. Things in Brazil are by now getting better.
Sorry for the non-working picture link, at the time I was posting that worked. will try again with this similar one :

Maybe with high speed the blades could form a complete circle, looking transparent. When stopping they could change to normal blades, rotating ´till stoped.
I would like to help in your project if you need.
Best regards,
Carlos