I thought the 407's were made out of quite a bit of fibre de glass now Mr Goldmember.
As for 407D's request, I think if we put the fuel into the turbine from the back, everything should spin backwards.....I think. :blink:
To solve the numerical blade problem, we could install a vortex Bi-directional sun jammer and this would effectively increase the axial co-efficient of the gamma rays from the sun, ensuring that your retina actually see's an even number of blades, unless you're flying in the dark. We don't have the technology stolen from the Bell/Agusta/Boeing/EH Industries consortium yet. They have effectively shut out all of our spies at this time due to the lingering rumour that Robinson is coming out with an extended version of the R22 with a rubberband powered fan in tail assembly.