In the past I have had trouble with un-cut A/R lenses scratching while edging (wet system).

You may be doing this already, but sometimes it takes me a little longer to catch on.

The frames with the magnetic clips when you open them up from the manufacture, there is a transparent clear covering that clings on the sun clip lens to keep it from not scratching while in transit.

I have, with scissors, cut that film in rounds just a little larger than my chuck and putting it on the (-) side of the lens at where the chuck holds the lens, now the chuck is not directly on the lens therefore, I have just about eliminated scratches while edging!:D

This also works when putting on the groove!

If this is old news, sorry, but it sure helped me!

Robert
;)