Fully loaded, try to go at least to the 16 foot length or even the 24 ft length. That is the total distance across the table end to end measurement.. On the 16 footer the center is at 8 foot and the 24 foot at 12 foot center. Your plywood sections are in even lengths and widths. Will work out nice and square before you cut it into a proper circle.

Do not put on any padding or carpet till you have the table properly cut, balanced, bearings well greased and adjusted. Has a proper footing or secure base support. You want the up and down bouncing kept too a very minimum. A Table that has too much play will injure the dogs shoulder, joints etc. You do need some padding but not to thick, helps absorb the downward shock of the dog's feet hitting the running surface. If Padding is too thick dog will roll it's feet and can create sprains in the first foot joints and ligaments.

As Maurice Carver once said it only cost a little more to go first class. Take your time and use the best materials. Cheers