The Biggest Unknown for Me is.....

[Maris]

Make open space inside the changing bag by stuffing into it the biggest cardboard box that will fit. Cut armholes in the box first. This stops the fabric of the bag drooping into the struggle zone between film and reel.

 

[markbarendt]

You want to avoid touching the image area of the film.
That means you can handle either end without concern.

I normally don't use gloves. I handle the film by the edges without worry.

- Leigh

Yep.