Hi
Recently released a podcast episode about kitesurfing in Banda Aceh.
Extended interview with Maurice from Seabreeze Kite Club.
Cool destination
Check it out on itunes: podcasts.apple.com/us/podcast/here-be-dragons-kitesurfing-travel-guide/id1207572419?mt=2
or on the website : herebedragons.earth/podcast/2017/8/18/ep5-kitesurfing-in-the-jungle-aceh-indonesia-with-maurice-from-seabreeze-kite-club

Hope you like it

and as always open for suggestions what to cover next , so drop me an email

Are there any spots further south, say 50 to 100 km south from longkna?

I am sure there are , the wind should allow for it, although the wind certainty drops the further South East you go.
Drop Maurice from Seabreaze kite club an email I am sure he could give you some advise on this topic
And if you decide to go there and find some good spots let me know....i would like to have you on the podcast