I'm working on a kit modification project in which I need to make two pieces from scratch. I am going to make them from styrene, glued together with Tamiya cement, but instead of molding them and casting them as solid resin pieces, could I just cut a little hole in the pieces and fill them with Smooth-Cast 320, making them solid? Since they are one-offs, I'd prefer to not have to use material to mold them, but my worry is that the heat of the curing resin will warp the styrene.