RobbyNitroz had een 5 sterren sessie in Zandvoort met maar liefst 15 - 20 knots op zijn SlingShot Wave SST (2017)
Actually, where the magnetic "flow" comes to a point is quite large in size, you do not have to be standing directly on the point to get North on a compass. Plus, the Magnetic South pole is not restricted to one position only, it moves around a bit.
See image below for the "flow"