servo motor

Hi All'
I've take a small servo motor apart to replace the bearings, and
made a mistake, forgot to scribe the brush plate end, how do I know
when the motor is at the correct timing? there is about 10mm play at
the brush plate side, i found some information on the net that says
to adjust it till having the lowest free running amp reading
ifrunning the motor one direction only but that is not the case with
servos right?