Thanks for answering Jake, good to know what you think.

I am with you on the spreader angle and diamond tension, but I think it's important to get it right for your crew weight. Heavier teams need more power (less angle and tension), and I guess having them out on trapeze helps bending the mast a little bit. We are talking small differences here, but still a difference (we still have a alu mast, and they also differ a bit in stiffness, so the sailmakers numbers aren't neccesarily the best, even we amateurs have figured that out )

We also tried raking the rig less, to gain power, with the result that we lost windward ability. Now we sail with one rake in all conditions, and are pretty pleased with it.
If you sail with your 'high-wind' rake setting in a light wind race, do you get killed off due to lack of power?

I am just trying to find out how important adjusting mast-rake to the conditions really is on a high-performance cat, as we have more or less found a setting we are pleased with. Ricks book discusses it, but my own experience or rather lack of experience perhaps, is that once it's dialled in, adjustments aren't really needed.