To the OP, here is a point of reference.
http://www.x-h2o.com/threads/114950-2000-SJ-2012-rebuild-with-10mm-Dasa-144-Mag-etc-2-5-quot-Flat-water-Surf-boat
This guy has been riding for some time, rides surf and FW. After a month and a half of riding a RN with a 1000cc DASA, Setback Mag, Mod...