[fortean]

Ken,

I used a piece of plastic trunking at the bottom but that was to give it a straight edge. It worked fine without anything but the felt had stretched when I pulled it through.

For the next one, on my 8ft screen, I will use a length of 6mm dowel.

As the screen drops the mask unrolls with the screen then it's pulled over the top and down the back. When the screen closes the friction of the mask on the screen allows the screen to take it back round.

I used double sided tape to secure it to the back. I am testing some adhesives now.

There is a light source behind the screen in the video which is why you see the mask shadow. This won't be seen under normal use.

A collegue of mine is making me a remote control to stop the screen automatically at each aspect ratio. This is a retro fit for a screen without remote control with an anticipated build cost of 30 GBP.