Self-acting rapido style N-gauge couplings

These couplings are designed to fit my non-bogie N-gauge / 2mmFS wagons on Shapeways, except where otherwise stated on the model (e.g. all except the 3-bay HUO hoppers, which have less room behind the headstocks and need  something that bit smaller and fiddlier than these). I have recently adjusted (increased) the spacing between the moving surfaces to 125 microns which makes them easier to clean and get working. Most of the time they shouldn't need shims of flexible plastic to act as springs, or fine nickel-silver wire running between them under the wagon, but the slots in the mount and pits in the backs are there in case you prefer to have them.   Most of my Shapeways wagons include couplings, so these are here in case you need spares or replacements.