WOW Moon, lots of testing and lots of Q's.... As far as the FO's, for whatever reason, not all of them will work w/all types of soy . I personally have not used the C-3. I have used the CBA for over a year, and do not have a "major" problem with the heat (I live in FL).It has been very consistent for me, but alot of people don't like it. If an FO did not throw @6%, I did not use it and also found that I could use less w/the darker heavier oils. I never use more than 9%. It sounds like you are leaning towards the 444....so I would say run w/that. You don't really want more than 1/3 - 1/2 " meltpool, cause your candle will burn faster and your FO will burn off sooner. Try not to overload yourself w/too much at one time....the joy of soy can drive you nuts HTH