Fast simple and reliable. The patented Ronstan Ballslidetm system buries the existing hull keel in the mast. It is therefore not necessary to mount a rail. The Ballslidetm wagons have so-called ?captive ball bearings?, which means that the balls stay in the wagon, even if the wagon is not mounted, and can therefore be easily removed and put on the mast when the mainsail needs to be mounted.
