I've only had my HV40 for about a week and I'm new to this forum, so I'm hoping this post is where it should be. In any case I made a simple fold up LCD Hood that looks pretty good and works well.
The PDF I've created for the design is for A4 Paper and you will need to set print Scale to NONE. If this design create issues for the guys using US Letter please let me know and I re-design it so it prints ok for you guy too.
The PDF is available Here
If you feel it needs a video tutorial let me know.