I've been reading for months and finally attempted by first candles. I am using GB 444 , 9 oz bottle. ECO wicks from Candle Science. I poured two candles for testing (Same FO). One with ECO 10 Wick and the other with ECO 12. They burned almost identical ! . I thought it would be so obvious which of the two worked best. I did notice that the ECO 10's melt pool was a better width then the ECO 12. Do you trim the wick after each burn? I wasn't trimming and eventually noticed some mushrooming. So I poured another set with a different FO. This time I poured without the wick because I read in a thread here how it's easier to switch wicks if needed (hand't even thought about that). This FO is a little stronger then the other, so I am thinking it will need a higher wick size? I am afraid of starting to low and then getting tunneling. When you test this way do you start higher and them lower wick size as needed? Thanks for your input.