Hi. I recently was lucky enough to find a cheap 20th Anniversary Optimus Prime. I also have the chance to pick up a trailer for him. I have a couple of quick questions. Is the 20th Anniversary Prime the same as the MP Prime, but more plastic? Same size, etc? So, the MP trailer will fit him fine? The trailer is going to be more expensive than Prime himself... worth it? Aside from the longer smoke stacks (anywhere to get these in the UK?) is there anything else that I really should get for him that is cool? Many thanks.