RE: carbon fibre and antenna
Just got off phone with futaba. They are unaware of any issue with carbon and reception. That being said, they havent done any tests either that the tech was aware of. Back to square one. My own projects includes a hatch under the belly for turbine access Ill make that from glass sandwich. Ill also avoid laying up multi layers of carbon on top of each other. I'll use thin layer of glass or Kevlar between them to avoid rubbing.