Polishing is most effective when the drag is heaviest. This is precisely the time when sleeks and scratches are suppressed. -- With Regards, Mel Bartels Programmer/Analyst, and amateur astronomer mailto: mbartels@efn.org homepage: http://www.efn.org/~mbartels How To Computerize A Dob: http://zebu.uoregon.edu/~mbartels/altaz/altaz.html