Hi everyone, I am looking to do a repain of the Voyager class TFTM Optimus Prime and I intend to turn it into an Ultra Magnus. I was looking through some of the heads that come close to Magnus and one I think will work is from Altinators Silversteak. My question is does anyone know if the head will be interchangeable?? I don't really want to buy Silverstreak unless I know the head will work. Thank you in advance for your help/ or any suggestions for better heads to use.