Folding bracket for leg on Kapex extension

[ear3]

I'm making a miter saw cart for home use of my Kapex, and have gotten the bracket from Multiblades to make my own left extension -- although I have the ones that come with the UG cart, I wanted to make something more substantial to accommodate wide boards.

I have a question about hardware for the fold-up leg on the extension.  I see that Multiblades also makes this bracket:

http://www.multiblades.com/mft3.html  [near bottom of page]

But I'm wondering what other people have used who have gone this route?  My strong preference is for a foldable and adjustable leg and bracket contraption that is mounted directly to the extension, rather than a sawhorse (like the Ron Paulk bench) or a separate tripod (like FastCap), because my setup involves a lot of moving around and the need to account for the uneven concrete of my driveway, where I do most of my cuts.

Thanks for any advice.

 

[Corwin]

Someone here used sliding door security bars to support their extension's legs. Real simple.

 

[TomE]

Used a T (gate) hinge on a wooden leg with a leveling foot .

 

[johninthecamper]

Use your  mft table next to the saw.
I use the wings on the table

 

[badtastex]

How about some diagonal support beams from the extension down to the base of the cart? It can easily be made adjustable by either lengthening the beam or changing the position where it meets with the extension and the "levelness" will not depend on the floor at all.

Jayscustomcreations recently linked to a workbench that used this techniqu (warning - no festools seen in the entire video).