Thanks for the reply Tom!
That is some great info! As for the wheels I am in the process of making some leveling jacks so when i put the table in place i could raise it a little and also level it. For the gear reduction what would you suggest? I have a 20* rack gear and a 15 tooth pinion gear. I could easily add belt drive gear reduction to my carriages. This is my first gear rack build and would like to get the most out of it. My plan is to have a well built table but low cost (the best of both worlds).