I will get a pic in the morning and post. On the red knob that tightens the Coupler (this is the joining section when the shafts are put together)it has a thread and then about a 1.5mm pin on its end that when the thresded knob goes thru the hole on the coupler it then goes into a rounded rectangulat section. The knob tightens onto this, but there is this little washer that I think pressses on the inside of the rectangular section . How I get this back pressed into the knob is my problem
