Hi, My tracker is now tracking well.  Thanks for all help.  I had not
explained it very well but what was missing was the friction roller
arm spring (ref. diagram from a booklet from John Tuttle).  The spring
was supplied loose with the player but I did not know what it was.

Anyway with the spring on and lots of fiddling, much as described by
Craig Brougher, it is now working well.  I did think I had done such
a good job of oiling the friction roller.  Live and learn.

Regards and thanks.
Les Huth
Australia