ed,
I don't agree...the material of the man, the shape of the foot, the type of ridges, if any, on the foot, the ball material (density, weight, etc within tolerences), the table playsurface material, the wall material, the bearing types, rod diameter, weight, and rod material are enough to allow for unique play characteristics...the ball, man, and play surface is 70%-80% of the current table characteristics and then each table seems to have some build characteristic that is odd...like the Telescoping rods on Bonzini and Roberto Sport or Garlando's very large strip and ramps
but when you play you don't have to face a different size play surface and goal...specific standards on these, like Tennis, Football, Basketball, Soccer, etc
all tennis matches are played on the same size feild although the field surfaces are much different but the net is the same height then their is the ball which has to be strick tolerences and then the racket and the rackets have tolerences too but the variety of how they are made makes a big difference in play...I see this like this