New parts from Hexagear.
https://www.kotobukiya.co.jp/product/detail/p4934054042692/https://www.kotobukiya.co.jp/product/detail/p4934054042708/https://www.kotobukiya.co.jp/product/detail/p4934054042715/Combined with earlier bug legs and head
https://www.kotobukiya.co.jp/product/detail/p4934054042913/Did Hexagear always have support for 4mm and 5mm pegs or did it start with their bugs? I was under the impression that they kept to 3mm like other Koto lines. Gotta add that to the OP list.