Hello. All. I am a complete newbie at soapmaking and just ordered myself two 4lbs wooden loaf molds. It is stated that they are 4 lbs molds and the dimensions are 14" long by 3 1/4" x 3 1/4". My question is in order to have a bar that will be 3 1/4 by about 2 1/2" high when cured, Do I need to...