Just says one set of spreaders. But why would you. Keep it simple.

Look into it harder. If you fiddle with rake means that you will weed to tention the diamonds along with the spreaders.

Philip Pearce has ajustable diamonds on a leaver at the bottom of mast.

My opinion is that keep it simple. The rake and tension of the diamonds depends on your weight and how flexible is the mast and how much you want to de-power.

I set mine 10mm - 15mm foward of the mast track and set the diamonds to a rought tension of 25 on the loose gauge

Matt