I find bone frames interesting and have always wanted one. However, the 5“ bone frames are too big for me and I wanted something smaller up to a maximum of 3”. So I sat down and developed a frame.
I already have the FC, I'm just missing the motor props and the camera - but they should arrive in a few days.
I printed the frame so that the first and last 4 layers are made of TPU and the first layer is made of PETG. This way you can combine both advantages.

As soon as the drone is flying, I will update the pictures and the text. 

My Setup

Flight Controller: BetaFPV F4 1S 12A AIO (2S)

Motors: BetaFPV 1103 Brushless Motors 11000KV (2S)

Props: BetaFPV HQ 3020 2-Blade 3"

VTX: DJI O4 Air Unit