ok so I am setting up a mec 9000 to a auto mate ,on the mec website or the auto mate book there is no mention of a heavy duty collum spring. but if you watch the videos on you tube the guy says to change the collum spring to a heavy duty one. watching the machine run, it is not going all the way up, if a give a little push it goes up another 1/8 of an inch and will index. any thoughts ?