This model is intended for conversion of the Parkwood N-gauge Warwell (kit 14) to the four bolster rebuild. The Parkwood kit will need some of the "planking" removed and other detail on the top surface smoothed down, and the conversion will need short wire pins added to the holes in the bolsters. The holes may need clearing out with a suitably small drill, and there are also sprues between the outer planking which I hope can be removed with a razor saw once the deck is glued to the chassis. You can get the Warwell kit from the N-gauge Society shop. UPDATE The first print was amazing, I showed it off at the Hung Drawn and Quartered pub pre-3D print show Shapeways meetup. I didn't bother removing the sprues when I fixed it to the wagon kit and painted it, and I'm pleased with the result. Buying another with no changes to be made.