This is kinda an answer to SMOG's statment on yinothing's thred. The g1 Onslaughts head fits quite nicely on the energon/ROTF Barracade/Onslaught. All you need to do is heat up the pin holding the "princess leia's" head and then replace it with the g1 head. Rather easy to be honest. I did a little silve ap to his face plate but might go alittle further.