The biggest complaint with the T1 Terminator figures by NECA were their 'McDonalds legs': Immobile, cast as a solid piece from the waist down.
I sacrificed two Duke Nukem figures by NECA to rearticulate two different versions of the Terminator figures. The end result was pretty amazing. It took a few hours of work over the course of a week to finish them. Here's some shots of the process: