I had a friend with maybe 35 years of experience tell me there is little or
no point in truing drums.  If they are so far off that the initial wear in
of the shoes doesn't true them the drums are toast.  Don't bother to true
was his point.

YMMV

Mike

 I think of flywheels like wheel brake drums, which need
> grinding to true them up when doing new shoes, so the shoes do not
> prematurely wear out or fail  to do their assigned task.
>
> Michael Nichols,  Atlanta, Ga.
> 2-'81 air cooleds
> 1973 beetle
>