I had to wait a little longer with the Cry Baby because the wah pot was dead, and had to order a replacement. In the meantime I convinced the owner to have it fitted with a LED indicator, something the live musician cannot do without in a wah. Any distortion or flanger effect you will HEAR that it's on, which isn't the always the case when you leave the wah in a certain position.
For the links, check the first Wah mod page, Stinkfoot's page is very detailed with regard to the different models.
Here some demonstrational footage. As it will feed of DC power and not from a battery I wired the led extra bright in order to componsate for the fact that it's a bit hidden.