X2 Elf hardware kit

A hardware set for X2 Elf frame. See the [rotorbuilds page](https://rotorbuilds.com/build/9868) for more details and pictures.

The camera pod is tested to fit Runcam Micro Swift and Runcam Micro Sparrow. The Swift is longer than the Sparrow, so there will be even less clearance for the stack because of the connectors at the back. The camera uptilt is 25 degrees. The pod gives enough clearance to run 2 inch props, e.g. Gemfan 2035 four-blades.

Update: alternative Runcam Micro Swift/Sparrow pod with 15 degrees uptilt is uploaded, as well as the one for Caddx F1 cameras, also 15 and 25 degrees uptilt.

The rear spacer is designed to carry a 9mm buzzer and has the notches for a cable tie to hold the power leads and the antenna in place.

Use M2 steel screws and tap the parts with the screws before assembling. Make sure the bottom screws holding the camera pod are not too long, 5-6mm is the maximum, otherwise you might ruin the camera by making contact with the PCB at the back.