Depending on the board model, 3D Contour Bases are contoured up 1-9 mm in the nose and tail. The rounded surfaces of the 3D Contour Bases are designed to be smooth like the rest of the base so they should be maintained if rough or damaged. You can grind 3D Contour based boards on standard grinding machines but you must grind the spoon surfaces by hand, not using the feed wheel. With the feed wheel lifted, grind the spoon sections by “rolling” the nose and tail side-to-side while passing the board back and forward on the belt.
The same “rolling” technique should be used for grinding the ‘Wings’ on the tail of the Hovercraft, Ultracraft and Storm Chaser. The Speed Channel on the Hovercraft/Ultracraft and Storm Chaser does not require tuning.
All 3D Contour Base surfaces should be waxed for best performance.