Two masts are commonly used by the great majority of top sailors: Supersparss M7+ and Proctor Cumulus. The main difference is in the LATERAL flexion in the top part, stiffer in the M7+. The LONGITUDINAL flexion is very similar although the Proctor Cumulus is just a little harder. The harder lateral stiffness makes the main CLOSER in the leech. To balance this effect and "open" the leech properly you should use slightly shorter spreaders on the M7+.

Few sailors are using the Goldspar mast. If so you should send us your mast deflections in order to get the proper sail.

It is important to set the distance CENTRE OF MAST FOOT to STEARN to 3.125 mm with the Radial Main and 3.120 mm with X-cut one. After this, the most important setting is the TENSION OF THE FORESTAY: you should try to obtain the same tensions mentioned in our Tuning Table below.

Tuning guide

Tensiometers Conversion Chart