Modified Old Oz Rotor Hoop reinforcement
Its modified since I've actually encased the paper clip in epoxy. I had a clean break at the edge of one of the hoops (see first pict.) which I sealed with cyanoacrylate. Then I used a large paper clip, using the handle of a paintbrush to give the two ends the correct bend. Finally applied 5 minute metal filler epoxy to the side and top and bottom edges, such that the clip is no longer visible. I don't know if this is going to be any stronger than the original Old Oz version. No crash after this to test
, but heli did flip to the side while the blades were rotating (but power off) during a landing, and hoops intact.