Dear AgX,

Good point.....!

The biggest issue we know about was conventional motor drives ( especially in the press days, when we were testing 72 exposure cassettes coated on polyester ) also, if you use good practice of tensioning a 35mm after loading by withdrawing the film into the cassette in camera after loading, if you go that bit too far and build too much tension it could 'possibly' damage the wind on, especially on older cameras.

Simon ILFORD Photo / HARMAN technology Limited :