Here are some pics. My dh changed the way the legs sit (#3). It was easier to have the 2x4s connect this way (attached with screws from the outside) than to have them sitting flat on the ground as in the pattern. If I remember correctly, the pattern did not call for a brace bar. I have 2 other rails (longer) and a brace bar to make it fit with the longer rails.
The top bars are attached with carriage bolts. There is an extra hole so I can move the top bars to place the quilt at an angle.
front view with brace
[ATTACH=CONFIG]218022[/ATTACH]
end view
[ATTACH=CONFIG]218023[/ATTACH]