Thanks, PunkyBoy. That is good use of plexiglass, especially making it a little taller and wider than the Helix screen.
The Helix screen is very different from the HD500 screen, so I am wondering how plexiglass and other solutions impact your visibility of the Helix screen and scribble strips in low light, indoor light, and sunlight. Anyone with other experience / recommendations?
Thanks for your help!