When we went to the auto parts store in Blue Ridge, I thought we had taken Pat's module out to have it tested. I believe Colin's old module and Pat's new one both tested good, so didn't we put Colin's module back in when we returned? I remember we had 2 modules in my car when we got back to the hotel. I remember cleaning all the compound off the back and giving it to Colin. Seems like the new one was gray in color.