This build is the result of weeks of planning, iteration, and testing — combining power, crisp video, and a minimal form factor with the reliability of a solid flight stack. I wanted a platform small enough to rip through tight spaces, but strong enough to carry a DJI O4 Lite with clean signal and no overheating.
Build:
• Frame: Custom-printed 2.5” frame in pusher configuration
• Motors: Happymodel EX1404 3500KV
• Props: HQProp T2.5x3.5x3 (for a punchy but efficient balance)
• Flight Controller: JHEMCU GHF722 AIO (40A)
• VTX: DJI O4 Lite (mounted above AIO with aluminum case for heat dissipation)
• Receiver: Built-in ELRS 2.4G
• Battery: 4S 650/550/750mAh (top tested config)
• Weight (AUW): ~90g without battery

Some challenges:
• Board Alignment: FC is flipped 180° (pitch) and rotated 180° (yaw) — full pusher orientation. Had to configure Betaflight to correct gyro orientation.
• Power to O4: The AIO lacked a dedicated BEC, so I wired in a Mamba BEC board to ensure clean 12V regulated output within DJI’s voltage limits (7–13.2V).
• Stacking: The build uses M2 standoffs through the 25.5x25.5 stack mount — securing the O4, AIO, and canopy with a single column of hardware. It took careful planning to keep the weight centered and the components isolated.
• Battery Mounting: Battery sits underneath (pusher layout), which posed impact risks — solved with a TPU skid and reinforced battery straps.
• Receiver + Cap + BEC: Space was tight — all components were placed with millimeter precision between frame arms and secured with tape and foam to prevent flex damage.

Reason to build it?
I want to fly in the park...

This drone sits in the sweet spot between a cinewhoop and a ripper — cinematic lines, quick recovery, and small enough to fit in a backpack or fly indoors.