Did anyone ever look into replacing the the 2 piece propshaft with a carbon fibre shaft.

was wondering if a single piece would work, I'm not sure what the impact would be if the central bearing was removed. (vibration wise, balance etc).
what is the max length before a central bearing must be included?

also the short front prop, this would be a good mod in Carbon fibre. (or Titanium)

together the props weigh 12.5kg, thats a lot of rotating mass, the weight of carbon fibre items would probably be around 5kg.