oh dear,
I just had to do a refresher for my HR at work .. the first thing my Teacher Examiner said to me if you do not use your clutch every change instant failure.
and then gave me a thing to read from Fuller transmissions . I had a bit of trouble remembering to clutch .. but got it . It was a new Isuzu with an 18 speed . . the highlight was a few hours on the skid pan going sideways ..