Are you sure about the record of Black-winged Kite? 20 would be an incredible number for this species, which is normally not seen in numbers greater than 1 or 2.
I was in the area on Sunday (31/10) and good birds included:
Radde's Warbler
Bull-headed Shrike
Mountain Tailorbird (San Shek Wan)
Asian Stubtail Warbler x2 (San Shek Wan)
Ashy Drongo (San Tau)
Chestnut Bunting x10+ (along N Lantau path, most around San Tau)
Common Buzzard x5