My Model Engineering
Here's a really rough set of adjustable coupling rods, these were fitted on the loco, then adjusted till the wheels rotated freely, and will be used to jig drill the second crankpin hole in the coupling rods. an adjustable coupling rod on the bench beside the loco frames I've just recently turned up the two pins at the front, the front one goes through the existing coupling rod hole, and one end of the jig, the second fits in the other hole of the jig and has a 5mm hole to spot drill the other end of the coupling rod. the adjustable coupling rod jig, assembled on a coupling rod