My method for doing the axleboxes is to clamp them into a bulky C clamp I made during school and drill them slowly with a cordless drill. This one I had drilled to correct depth but needed to open the sides a bit as the axle was a little crooked. It bit down by accident and ripped straight through the front. If you ever need complex coupling rods designed, Id be happy to help. Though dont expect them to go together easy. Mine certainly dont.