What is the maximum distance you are comfortable with flying your Spark? For me I feel like about 900-1000 ft is my max comfortable distance. At about 1000 ft away the Spark is pretty hard to find in the sky.  Let me know your thoughts. Thanks.

To be honest, here in U.K. about only 400-500 for me. Too many compass and imu related problems.

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It depends on the sky and lighting conditions.. normally I have trouble seeing it at 400-600 feet.. but one day when it was cloudy I managed to fly out to 1300 feet away and I could still keep my eye on it... I don't like letting it out of my sight.

I have similar experience with the OP. The farthest I have been to is 1409m but 250m~350m is my comfort zone.

300' at a 350' altitude , if i'm flying at the field only because the tree line is about 700' with no real opening . upstate i will fly at a lower altitude about 500' out as long as i can see my spark . most of the time i just fly close and in sport mode just for fun . it's a nice quad small enugf to take anywhere .
fly safe