I've never run into one that didn't leak. Wear an apron, keep a towel nearby to dry your hands, and don't worry about a little leakage.

As for rolling the film, just practice a lot. If you want to use the teeth to grasp the sprockets, it's important that the sprockets are parallel to each other. Easier said than done, in the dark. Sundowner's method for removing the film will give you an even area to cut.

Hey John- Long time... I still need to get those Zone VI newsletters. One of these days...