Seems there are few people noticing the difference on ironhide and ratchet's shoulder assembly and a user on weibo posted showing ironhide's one is actually mis-assembled

basically the ratchet shouldn't be showing as follows




as the original pics for both are the same




aside from the look it apparently affect the alt mode how the windows tab in (however i can't really tell the diff)





easy fix tho, simply take apart the shoulder and swap over the left /right the ratchet piece (the part of the bottom left)



I did mine in about 10min so its pretty quick fix if anyone want to do it