One good tip for all sharp-edged props: prior to importing into Poser, load the OBJ file into UVMapper (preferably UVMapper Pro, which offers greater control) and split the vertices. That gives the whole mesh a "cleaner" appearance, and avoids those dark patches which can be seen on the barrier counterweight, for example. It looks good. I hesitate to potentially add to your work load, but is it a static prop, or have you made it posable?