Probably a basic question (I'm new, so forgive my not knowing)... I want to make salt bars but the recipe I'm looking at calls for: 12.8oz Coconut oil 2.4oz Avocado oil 0.8oz Castor oil 4.82oz Water (reflects a 20% discount) 2.43oz Sodium Hydroxide (reflects a 15% discount) 16oz Sea Salt ...I don't have Avocado oil, can I use canola or olive ( I have palm too, but I think that's another solid) instead as long as I run it through a calculator? any other advice on salt bars would be appreciated too. I understand they need to be cut soon after being made before they get too hard.