I used the same hip arrangement from my first home made effort (salvaged from a toy telescope tripod with one leg removed) as it opens and closes nicely.
Here it is prepaired for lower spine and leg attachments.
...and here with spine attached with exposed wire for flexibility in sitting etc.
upper spine and shoulders attached (2 more open cable areas for more
spinal flexability.
legs fitted with knee and hip/thigh cable joints showing.
showing leg opening capability.
showing knee and some back manouverability.
Feet attached (thanks again , Samurai) and some leg "muscle" added.
arms attached and more musculature added.
neck attached (long enough to go right up inside skull for head attachment. More padding to be added to hips/legs and remainder of body to be clad.
Poor psp work to blame for jagged outline.
Work continues....