Rolf

Visual check on the windward wire tension is fine, it must be done whilst sailing obviously, and needs to be fine tuned on the water, once the setting is known you can measure with a tension guage so that when you replace the wires it is easier to set.

I know you are all aware that masts differ in wall thickness (usual tolerance is 5%) and stiffness, but when looking to tune your mast just taking the numbers from one mast will not reproduce the same characteristics on another one if it is not the same.

The later talk about a new mast was after my time.

john