Sid,
Thanks - Your comments make a newbie proud.
Russ,
I agree and do plan on making some changes. Just wanted to post the first version to show the advantages of locating the pivot away from the edge of the opening.
My thoughts include using wood or plastic and having some "bumps" on either side of the track ties to also align it side-to-side as it comes down. (Cross section - Tie is shown in red)
I also want to experiment with an air strut like to ones on my truck topper window. With the right geometry and a slight over center it could both hold it straight up and put slight pressure down when closed. Mini-van rear door ones might have to much push but the window ones on my topper seem about right. Next time I am near the place where I purchased it I will buy a replacement strut. Won't they be suprised when someone buys a single strut.
Strut is blue. Black line just shows a connection bar/pipe. It needs to be bent to miss the table edge support. If anybody gets around to trying this before I do let me know how it works.
...jim