This is a set of detailing parts at 4mm:1ft (OO-scale) chassis for my Southern Diagramme 3105 plastic luggage van, British Rail PMV. The brake blocks fit through holes in the floor of the chassis (uploaded separately). The v-shaped safety loops for the longitudinal brake linkage should glue to marks underneath the chassis. Use wire to model the linkage itself, and anything else not supplied. The steps should glue to the chassis below the doors in the body, and the handwheels (either of 2 different designs) should be cut apart carefully (very carefully, for the bare-spoke ones without a ring around the outside, assuming they even print well enough), drilled through the centre with the tiniest bit in a pin vice (there is a pilot hole the length of the sprue, but it is likely to be blocked by support wax) and mounted on a piece of wire glued into the guide under the chassis.