I recently had the task of building another 2.5" naked GoPro frame and stumbled upon the Baby Tank O3 Frame Kit from Farinsframes. At only €69, the price was reasonable and the frame looked well thought out.

When I received the kit, I was impressed with the mint condition of the carbon fiber and the inclusion of all necessary hardware. The kit even came with an extra battery strap and presoldered XT30 and battery wires. Additionally, the 3D prints in TPU were of excellent quality.

I salvaged some parts from a Foxeer Foxwhoop 25 frame that I had lying around.
After some minor soldering and assembly, the frame was ready to go. I did some test flights with my old naked GoPro 6, which has seen its fair share of action, but is still going strong. The provided PID settings worked perfectly, and the drone flew exceptionally well.

Overall, I highly recommend the Farinsframes Baby Tank O3 Frame Kit. It's an excellent value for the price and is well-designed, with high-quality components and thoughtful extras. It was a easy under 250g + GoPro naked build even with my "heavy" big battery.

Some example shots: