Originally Posted by Faster
We have an acrylic dropboard for normal security, but I made a simple plywood facsimile, made some substantial cutouts in it and applied screening to it.
We simply choose which one to use based on the conditions we're in. If you have multiple drop boards you might choose to make one of them with screens and another with a lens and use them interchangeably as required.
My usual upper board is smoked acrylic also. We wanted some additional ventilation for overnights and this winter I made exactly what you're describing using 1/2" birch plywood ($10), some Pet-Safe screening (~$4) and scrap moulding. I sealed the edges with epoxy and finished with Cetol. Didn't go for teak to keep the cost down, especially since I'm not going to be using it all the time. I'm pleased with the results and the price was right
*When* (not if...) the screen gets $#&@'d, I can just pop off the trim moulding and staple in another panel.