Bobcat,

I generally sail cat rigged (ie 1-up) and I'm running the following:

Mast Rake just to bottom bolt of the upper gudgeon:



The spreader is 28.25 inches from diamond wire to diamond wire at the spreader:


And measured perpendicular to the luff track is 1.875 inches.


I'm running #33 on the Loos guage (I understand that to be de-powered---ie more pre-bend); although I haven't played around at all with this setting.