Dean,
That is a really nice set up and should work well. There was a retired machinest and engineer here that put a similiar set up in his garage a few years ago, but he was a nut about designing things and he had put in electric jacks of some kind at each corner so the bords, covered in steel, could be lifted to abut 12" high. I think he spend almost as much on it a a Kwick Lift, but for him it was the fun of designing it.
As for the floor jack and jack stands. I ony use the floor jack on my Kwik Lift. What are the stands used for? I have the bridge that I can put a jack on when the cars are on the lift if I want to remove wheels, etc. Anyway, great job and it works and that is what counts.
Ron