Available for purchase here: https://www.shapeways.com/product/522JMHZJB/s-dr-derwent-motion?optionId=64964227
 
Please read this description!
Please note: This product has yet to be test-printed. As such adjustments may be made in the future. If you order this please leave feedback and if you have any issues please contact me at:
southcoastrailwaymodels@gmail.com.
Motionwork set for my model of Stockton & Darlington Railway No.25, 'Derwent'.