Restoration ramps

[dagriff]

I came across one of these last time I was in the U.K. Called Restoration Ramps.
I couldn't get close to it, so these are photos from the web. The makers say it will take 2,000 lbs.
To me it looks like it needs some diagonal bracing to stop it folding.
The steel seems to be 2" angle.
Anyway, my initial thoughts were that to make me feel better, with some diagonals and maybe square tubing in places, building one would be ok for the M.G. Midget (1,600 lbs). Plus with some extra strength & stability, go to 3ft. (they are 25")
Then of course, I pondered what would it need to put the 911 on it.....
Anyone who knows this sort of stuff care to comment?!
Griff.