Purge button added to Lincoln SP125+

Greetings All, I posted in the Metalworking.com Dropbox a text file explaining the circuit changes to and the schematic of the Lincoln SP125 Plus welder in order to add a gas purge button. The files begin with SP125+. I forgot to turn on word wrap in the text file so it has really long text lines. Oops. When viewing the tif file of the schematic using the viewing software to blow up the image will allow the schematic to be seen clearly enough to identify the areas mentioned in the text file. Anyway, the circuit changes allow the switching of low voltage by the added push button. This makes for a safer unit because the switching of the 125 volts to the gas solenoid itself is still done by the original factory circuitry. If you make these changes be sure to coat any areas of exposed circuit board and components with some type of non-conductive conformal coating similar to the factory applied coating to prevent shorts from any conductive dust that blows through the welder. I used clear 5 minute epoxy. Some silicone seal products use acetic acid in the formulation. They smell of vinegar. Don't use them because they can cause corrosion of metal inside the sealant. ERS