Link V4 With Wheel AST MLearning windsurfing is easier on the right board. The Link V4 is purpose built for schools, clubs, and training centres: stable and forgiving underfoot, robust enough for daily fleet use, and designed around the needs of instructors as much as the sailors they teach. Stable from the First Step A wide, generous outline and parallel rails give the Link V4 consistent, predictable behaviour across a wide range of rider sizes and skill levels. New sailors