Hello everyone,

I have a question I hope you can help me with.
I would like to connect an A3 flight controller to the N3 flight controller I have now on my DJI S900.
But I don't know wich one to buy. Is the A3 upgrade package enough? Or will I need the full A3?

You just need one A3 upgrade kit. It will interface with your N3 via the expansion port on the side of the N3, and provide you with additional IMU and GPS redundancy. In this configuration, the N3 becomes "N3+" and needs to be configured as such in Assistant 2. In operation, the N3 will then default to using the superior A3 IMU and GPS modules, unless it detects an issue.

Just to clarify, do you mean that you wantto add an A3 GPS and IMU kit to the N3 to get the double redundancy, correct?