In article m,
says...
Another "agree". I only did about 50 before I gave up. It is a slow,
tedious, unpleasant task. I recommend sending them to a specialty house and
let them do it. 1000 slides should take you about 2 years.

Don Dunlap

and after the first 1000, you will want to redo most of them because you
are just getting the hang of it now.