Hi, I managed to get the old door boot seal off and will install new one this week, I am looking for the center of the control knobs for both washer and dryer, the washer control works OK but dryer knob won't turn on shaft, I can't find a part no# in the manuals that Greg loaned to me. I'd appreciate any suggestions, the thread size is 10/24, I thought I could put an extender on threats and try to attach center knob, Thanks Kim