Audio recordings: Andrew Hsiu. (2017). Ku (Wujiazhai) audio word list. Zenodo. http://doi.org/10.5281/zenodo.1122945
On April 16, 2013, I interviewed Pan Shulin 潘树林 (32, male) of Wujiazhai 五家寨, Shede Township 舍得彝族乡, Qiubei County, Yunnan, China. Ku of Wujiazhai is mutually unintelligible with Ku of Bainitang. Unlike the Ku of Bainitang, they do not have hanging coffins, and do not know where their ancestors had come from.
Besides Wujiazhai 五家寨, this variety of Ku is also found in Dabantian 大板田, and in Longeshan 龙歌山 (of Nijiao township 腻脚乡).