How does your load mass (empty aircraft, you, fuel, cargo etc) fit to the J160 specs being:-
Forward Limit: 180-mm (7.09”, 18.2%MAC) aft of datum up to & including 440 kg (970lb) 233-mm (9.17”, 23.5%MAC) aft of datum at 540kg (1190lb) Linear variation between points.
Aft Limit 292-mm (11.50”, 29.5%) aft of datum at all weights Datum Wing Leading Edge
Cheers and look forward to your flight feed back.