The alu F16 mast is very flexible side to side, but it works impressively well nevertheless. Don't worry to much about strange curves in the top of the mast unless you are flying a spinnaker and the S-curve is pointing forwards. Don't compare yourself to much to other boats (masts)

The mast can take most of it without a hitch. just trim the mains so it feels fast and smooth.


Adjusting spreader rake doen't induce more stiffness to the mast between spreaders and hounds; that only changes the prebend and the distributation of spreader induced stiffness over the side-to-side and fore-aft-place. Some refer to this as changing the amount of "pumping" the rig will do.

The only way to increase mast stiffness between spreaders and hound it to use thicker (or stiffer) diamond wires and to increase spreader arm length.

To change the bending of the top otherwise then through the mast rotation control you can only move the hound fitting up the mast, there are no other factors to play with here. But of course moving the hounds up is not a simply modification by any stretch. So here you are stuck with the mast rotation as the only control.

Play with the mast rotation with a tight mainsheet and see how the top reacts to that. There are sweet spots to be found there, but they are sensitive to the right rotation setting.

Wouter