Here are the settings that we are using on a couple of Alter Cup Blades with the Glaser sails.

Ed's Mast
Spreader Rake - 2 & 5/8"
Spreader bar length from bolt nearest the mast to diamond wire - 17"
Wire to wire at spreaders - 33.5"
Prebend - 1 & 1/8"

John's Mast
Spreader Rake - 4.75"
Spreader bar length from bolt nearest nast to diamond wire - 17.5"
Wire to wire at spreaders - 32"
Prebend - 1.5"

We just started racing so we'll see how it goes. Ed