The little spool that has the teeth that pulls the film was broke on my old Praktica MTL-3. The problem was that the outside piece was disconnected so I put epoxy on it, but to speed up drying I put it really close to a light that was much more powerful than I had expected. The rings on the top and the bottom of the spool had melted and just folded in. Yeah...it basically sucks, I need to fix.