Lizard knees; T2 vs. T1?

[dr_cyclops]

Wondering how different the kness joints were on a T2 from a T1. The MM shows a great pic of the differences between the arm designs, but not leg/knee. Did the T2 body have plastic pins or metal rivets? Were the lower legs the same on both?

[skid14]

metal pins on the T1, plastic on the T2. the lower limbs are different between the two.