I had a go at making my own wagons out of balsa wood after a story one of my high school teachers told me. I wont explain the story yet unless anyone asks to hear it as it is a little boring and won't really add anything to my wagons. 

It took me about a week and a half to make all three (as it was my first go and I was a little slow) they run quite well and are very small. However because of the metal wheels they weigh more than Peco's SR 4 wheel wagons.they aren't the best looking things in the world but as they are very small if you view them from a normal distance they look fine.

I am still very pleased with them.