I am going to try this recipe, but I have never made a lib balm, and I am wondering... If I add castor oil... do I use less of one of the other oils? Also, can I sweeten it with honey? If so, would I need to use less of other ingredients? I am just going to play with it but I am going to use Mango butter, and I only have a small amount so I do not want to ruin it! I am a lip balm fiend. haha Any suggestions would be greatly appreciated!