This is my first attempt at making masters of L&B couplings which I’m hoping will prove suitable for lost wax casting. These were made with bits of brass rod, strip and tube all soldered together with 221 degree C tin/silver solder (I’ve got the burnt fingers to prove it). The base is a separate component and the springs will be functional just like the real thing. The long bit hanging down from the chopper is a sprue.
Update 25/6/2011 – see: running trials