Are there any improvements for this switch on my 64 Lowboy? The old girl let me down during the abnormal snow and cold we just had. Wouldn't hit a lick, and had to shovel alot. After bypassing the switch with a jumper direct to the battery, it was determined that the switch is at fault, at least intermittently. She's all original, and would like to keep her appearing that way.. Single knob, out is on, and pushed in is off. Sorry I haven't been around much lately.. Thanks, Stan