Loosen the screw on the back of the rocker and slide the cam toward the center (to decrease the tilt) or perimeter (to increase the tilt) and then tighten the screw.

 

You can place a stacking tray on a platform, as pictured below on a Next Rocker Pro, or remove it when desired, without any tools.  The spring loaded legs hold the stacking tray in place.  There are 4-1/2 inches of space above the main platform; 4 inches of clearance along the perimeter walls.

 

Stacking trays are available for all Next Rocker models.  These rugged trays double the support surface area.  They are constructed of heavy gauge ABS plastic for ruggedness. A textured neoprene rubber pad is bonded to the surface for traction. 

 

NR102 Next Rocker Mini with an 8 inch wide x 9 inch deep platform.

Size: 8 inches wide, 9 in. deep, 6-1/2 in. tall.