About the 60cm mast. The Fliteboard AIR is compatible only with the 60cm mast eFoil unit. The Fliteboard, PRO and ULTRA are compatible with both the 75cm and 60cm mast eFoil units. So you can interchange almost everything – except that you can’t use the 75cm mast eFoil units with the Fliteboard AIR boards. The benefits of the 60cm mast are that it is more user friendly – it is less likely to fall on the wing, and when the rider falls it will be from a lower height above the water – and that it is less extreme – since the maximum height above the water is less. The benefits of the 75cm mast are that riding in choppy conditions is better – since there is more range of height to fly above the chop – and that the board can be carved harder and in tighter in the turns – because the mast allows for a lower angle in the turns before the board touches the water.