The original design of the prop guards is by Tiaan Muller and his work can be found at: https://grabcad.com/library/wishbone-bumper-kit-ethix-cinerat-1 I modified some of the parts to fit the frame properly and be 3d print friendly.

The guards have a hole towards the front for an immortal-t antenna to rest inside of.

New gopro mount, since the original one was further back, moving it forward increases space for a larger battery.

Developed a slimmer camera cage, for analog cameras. The original was meant for a DJI camera and if you used an analog camera, you could see the sides of the bumper in camera.

An antenna pole so you can mount it towards the center for improved video transmission.

Lastly I developed a new holder for the xt30 battery and balance connector. It keeps the wire safe during crashes.

I've also included the fusion360 file for anyone to update an edit.

railcore-ish

No

Yes

200

20% Triangle

If you print in tpu, slow and steady is the way. I recommend printing each item by itself, to reduce stringing. I recommend printing the bumper guards in a stiff TPU (98a shore), otherwise they add a lot of vibration and can bend into the props. Printing the guards with something stiffer like PLA, PTEG or Nylon works, but be prepared to reprint when they break.

Everything else, a soft or stiff TPU is recommended.