The Kotobukiya's 隻壯絕合金 is a fail design. The joints are PVC ball joints only. They can't tolerate stress at all.
I have got three of them and one of them had multiple fracture over hip, trunk and shoulder.
The first one is Yujin master action figure.
PVC in nature
color ver 1, ver 1.5, green and gold.
=>>you may still find this in Richmond 2/F and Wanchai 188 1/F
The second one is a MG sized 山口式可動 resin white cast. You have to build it by yourself.
I bought the original white cast at $2500 from Japan and I built it by myself.