I'd like to understand the basic theory behind mast shape and settings - in particular, the effect of spreaders. For instance, if I have 1.5" of pre-bend, does it matter whether the spreaders are in their forward or backward position? As far as I can see, I'd need more diamond tension to achieve a given amount of pre-bend if the spreaders are in the forwards position rather than back, but does that affect sailing performance?

Let the debate ensue!