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Similar to the WD Poll four-bolster wagon. Experimental kit including bogies with longer couplings because the bogie pivots are about 1ft (2mm) further back from the bufferbeams than on the more common warflat design. The bogies in this kit have fixed rapido-style couplers one end and pockes for either short or standard NEM couplings the other. Pick the bogies/couplings you want, keep the others for another project, and remove whichever coupling you don't need.