ORIGINAL: Prop Nut
Your lid system looks great. How did you make the mechanism? Here is a great field table for you to put in your trailer

I use one of these when I go to flyins during the summer. I made up a bunch of them today to take to a swap meet this weekend.
Wow - is that slick! Is that your own design? Or are there plans available somewhere?
Very nicely equipped workshop as well!