I am fixing to try making a candle in an apothecary jar with a 4" diameter, using 4627 with 8% FO (since this seems to be the suggested amount for this wax from what I have read). I am planning on using ECO wicks, since that's what I have on hand. I have tested this jar size in soy using an ECO 16, and it melts all the wax (including the sides), even though I think it burns a little quick. My supplier suggests an ECO 10 for a 3.5"-4" diameter jar. Would this be a good size or should I maybe start with an ECO 12?