The original model was a hot mess, and a reddit user requested someone fix it up, re-slice it into sections, and add assembly pins.
https://www.reddit.com/r/3Dprinting/comments/77gk11/fixing_bad_stl_for_better_prints/
Technical
Print the Pin.stl (4x) one for each limb. There is a 0.15mm clearance on the pin, so you may scale the models up without issue. The pins are shorter than the pin holes, to allow for a glue pocket.