I’m currently designing a compact indoor-use kit around the Starling 2 platform, specifically the Starling 2, not the Starling 2 Max.

I would like to add a few additional lightweight sensors to the drone, but I could not find a clear specification in the datasheet for the available payload capacity or recommended payload margin.

Could you please clarify:

1. What is the maximum recommended additional payload for the Starling 2?
2. Is the published drone weight already close to the practical lift limit, or is there usable margin for small external sensors?
3. Are there any recommended limits regarding added mass, mounting location, or center-of-gravity shift?
4. Would adding small sensors affect flight stability, flight time, or PX4 tuning in a way that you recommend avoiding?
5. Do you have any other compact indoor-capable drone models that may be better suited for carrying additional sensors while still staying smaller than the Starling 2 Max? (Maybe the Stinger FPV?)

At this stage I am still in the design phase, so I do not yet have flight logs. I can share the planned sensor weights, mounting concept, and pictures/CAD layout if that would help.

Thanks in advance