FTX-100 0803 Motor Mount

FTX-100 Motor Mount

FTX-100 emerged from the Japanese drone community

https://www.xt-xinte.com/h-product-detail.html?goods_id=556345
This frame seems to have two kinds of 10.5mm hole version and 9.5mm hole version.
This mount is for 9.5 mm holes

https://www.youtube.com/watch?v=Qf19dpT9zvw