Here is my simple solution, way better than a monitor shade.
1) Works most of the time, you can adjust the size, and placement by simply expanding it or moving it around a little.
2) Use a piece of duvateen (sp?)and put some velcro on both your top stage and your monitor. Stretch the material between it. Takes about a minute to add/subtract or move.
3) The pictures show operating on the right side of the sled in traditional missionary.
4) Obviously if it gets in your way or its a very windy day it is an issue and then you can't use it.
I've been using this kind of thing for a very long time, now its really great with LCDs. It makes an even cheap LCD workable/useable for a much wider range of sun/light conditions.
It is shown with a cheap $400. LCD that does a good job with the shade shown and the brightness turned up.
Just thought I'd share.