I'm sure that DJI has done the research, but I have a question on prop blade design.  The supplied props are two bladed and made of plastic.  Is there flight efficiency to be gained with a 3 or 4 blade propeller design?  Also the same question if using a lighter composite such as carbon fiber?

I'm sure that DJI has done the research, but I have a question on prop blade design.  The supplied props are two bladed and made of plastic.  Is there flight efficiency to be gained with a 3 or 4 blade propeller design?  Also the same question if using a lighter composite such as carbon fiber?