Underframe
13) NOTE: the underframe is not attached to the car body at this point.
Remove the flash from the ribs, and drill them out with a 1/16" drill bit.
Also drill a 1/16" hole in the center sill and the bolsters.
Bend 1/16" brass wire as shown, and thread it through the ribs. Once
satisfied with the alignment, glue the ribs to the underframe.
Repeat this step for the other end of the car.
14) Clean the flash off the truck mount, and drill out the
center pin with a 5/64" bit. Also drill out the four
corners of the truck mount. Note that the truck mount,
if oriented properly, will be centered in reference to the
bolster.
Glue on the end ribs, using the scribe lines on the
underframe for alignment.
You will need to test fit the trucks at this stage, because
the 256 screw will be too long. Put the screw in, and
mark it from the back, then remove & cut it to the
proper length. Leave the trucks off for now, and save
the screws somewhere.