As with many concepts posted on CD, not all of details are shown like reinforcement plates for the corners, spacers between the rails, the belly pan attachment scheme, adjustable rocker design for end wheels, axle attachment system to rails, all of which are carry over from our 2014 chassis.
Bimba FS-090.75-CFT cylinder paired with ball caster
http://www.essentracomponents.com/sku/ACC-1072