My first post , hope I didn't miss this issue in the hiding in the searches . I have finally started to figure out what sound I want to get with my rig. The problem is I have been abusing it for the last three years. I broke the contour knobs off moving a while back and never fixed them . I guess now I feel like I would like to have them, but I'm cheap and would like to do this myself. Is this something a master mechanic/ ok electrcian could do ? Does anyone know where to the get the knobs? I don't care if they look the same. I think it would be cool to be diff. anyway. Can I mod this at the same time? I know very little about the circuitry so this may be way off. Thanks in advance. I have been lurking and learning for several days now and am looking forward to my first replacement tube whenever 4 to 7 working days is over (I bought three different types for different sounds).