I think the instructions should have done the legs before moving the arms after they are separated and straightened out. The joints are so tight the arms can just stay pointing out the back, while the legs are straightened out and the panels fixed to the lower legs.

I transformed the second one last night (finally), and couldn't see anything broken or missing... phew.
Maybe we got lucky, as some people in America were claiming things missing, and we had over 600 Unicron toys brought into Australia.


I started putting in the yellow tabs, and the second one I put in (one of the horn tabs) just kept falling straight out... so I'll definitely be needing something to stick them in place.