I'm beginning work on my custom Stunticons (totally upfront, this is for me, not selling, my own collection) and i'm going with RiD Ultra Magnus for my Motormaster. I'm doing some work on the trailer part, making it short so he doesn't stand so freaking tall in robot mode. While i'm doing work on that part I want to make it into a more traditional trailer instead of a car carrier. I want to keep the side parts but I want to fill in the holes with something and make a top to convert it to a full on trailer. Any suggestions? I was thinking of using as much of the top part as possible but filling the rest with Styrene. Does this sound appropriate? I've got similar plans for filling in holes and creating parts for other customs and for solid large pieces like this I was wondering if Styrene would be the way to go. Thanks in advance.