The AOS 4 uses 2mm Carbon Plates to hold and protect the camera. These are stiffer, lighter and cheaper to replace than aluminum or titanium.

The camera plates include 2 standoffs to maximise durability and a cutout pattern that supports DJI O3 and all typical19-20mm FPV cameras.

The AOS 4 has 32x32 mm M3 mounting holes up front for 3D printed mounts for your HD camera.

The 2mm thick main plate supports a central full-sized 25.5 or 20mm stack. Alternatively you can run two 25.5 or 20mm stacks, one in the front and one in the rear. The M2 20mm holes are designed to be easily drilled out to M3 if required.

The cut outs in the top and bottom plate of the AOS 4 are optimized to preserve as much of the bending and torsional stiffness of the plate as possible whilst minimizing weight.

The AOS 4 uses a topology optimized truss design for the arms. This truss design provides enormous torsional stiffness, resolving a key source of vibration in traditional frames. It also allows two particularly harmful resonant modes to be individually modified to separate them in frequency.

Truss structures are inherently very strong as they convert bending loads into compression and tension in the individual members. Carbon is much stronger in pure tension and compression than in bending. The 3 screw motor mounting reduces weight and removes the motor hole that can be a stress riser for compressive failure in hard crashes.

Y-shaped motor protectors minimize the risk of damage to those expensive components. Should you ever need to replace an arm, there are only two screws to undo and neither are shared with your electronics.