Before you do anything, you should consult a specialist that does this type of work all the time. They may be able to guide you in the right direction as to whether to convert you camera to S-16 vs Ultra-16 format. I used Bernie O'Doherty at www.super16inc.com. He did my bolex and recommended the Ultra 16 format for my camera, saved me a lot of money. Having a professional advise who specializes in Eclair cameras and get a free quote doesn't hurt.