Thank you for all of your comments so far. I sure I will have many more questions along the way.
Motion Dave I like your setup, but like bob I am looking for a little more motion since I would like to flight sim as well as race. I am wondering if I could make your setup and just make it a little longer and maybe a little taller to get more degrees motion.
Bob - you setup looks a bit too big for me. That looks like it might take up an entire garage.

.
Both good looking units though. I do have a million questions coming to mind * Such as the casters used for the pivot points. Where did you find them and sizing? After talking to a couple others they are saying 1-1/2" square tubing for the outside base frame and 1-1-1/4" for the rest. Does that sound right? Dave what did you use? Do you have any flex problems?
Thanks guys for the assistance.
I'm hoping to have my electronics working tonight. Have one side of my h-bridge not reversing at full speed. But finally got tronic's h-bridge 75% working.