Mike,
Ben Hall has fixed sweep carbon spreaders, and he is/was the north american champ, so I'm sure it will work for me. Ben advised me to use 60mm of sweep, and the current thinking is 450mm long, the A2 spreaders are 500mm long, but then you risk hitting the shrouds with our spreaders.

I made a simple jig so that these spreaders were at 60mm of sweep at 450mm long. See the photo. I also added a very unscientific upward angle (dihedral angle) of a 1.5" over the 450mm, so that they would be more level once the mast was racked back.

The trade off in weight was worth giving up the adjustability. Plus, if I really need to adjust them I can always just "adjust" them with my dremel tool. I can pop out the delrin end and modify them pretty easily.

From what I understand the only guy that adjusts his spreaders frequently is Lars Guck, I'm probably not going to be adjusting them anyway, so I'm not worried about it. I'm going with fixed diamond wires, as opposed to adjustable diamonds, so I think it will be ok.

Plus the proctor spreaders are $225 once you include shipping, without the mast brackets, and these worked out to be much less cost and much less weight.