Weldcraft TIG Torch - A-200 Modular Valve Air Cooled TIG Torch hi, i asked awhile ago which adapter this torch reqires for hook up. 105z57 is not the adapter. this has a huge fitting on it. i suggest, maybe you pull one out of its package and look, because i am having a heck of a time finding the right adapter to run this torch. i need to use it, like yesterday. i including a pic of my dilema. naturally, the larger end of the adapter fits my gas, but there is no way i can hook up the other. thanks