Thanks H, very useful.

Looking at the mock up of the finished item, the wires look a little short for my use as a flylead, have you shortened them to a length that suits your final requirements or is that the maximum length of the wires? In the bags they look much longer. This will give me an idea whether or not to buy an extra 3 x 663 (female pins & wires) and extend one of the leads a little further, i.e. solder the bared end of each wire into the female pin of the previous wire.