Your D7000 supports HSS, and is set correctly, but your flashes do NOT support HSS. This is the cause of your banding issues.Hi I tried using AutoFP 320 to achieve high speed sync with Neewer 750II flash with a shutter speed of 1/1000 and got banding, also I tried the same with Godox SK 400II strobe and still got banding issue. Is there anything I am missing here...Please advice.