More signs would be great. I think you should add them and some cans to your collection.
I am a gas pump guy. I told myself when I started I was only going to do gas pumps. I went many years only doing pumps. After seeing other collections with signs, cans and globes they look great all together, so I decided to do more than just pumps. I wish I would have done it earlier. Here are a couple shots. One is bland with just pumps. The other has signs & stuff and there is more to look at.