15-5-2020: We checked 2100KW and 2800KW on site, there is the big gap and distance when assembly the casing, had required WM to work with their supplier to investigate and improve. 18-05-2020: Feedback from WM, they asked their casing supplier come to WM, they found that WM miss screw for the casing, after screwing, the gap and distance for 2100KW and 2800KW could be improved.WM had sent the pictures after screw.27-5-2020: Will follow if this point will be solved.