I recently made a batch of Pine Tar soap using the following recipe. 60% Olive Oil 20% Coconut Oil 5% Castor Oil 15% Pine Tar I also added Activated Charcoal and I was very pleased with the results. I would like to make another small batch and introduce Neem Oil. My thought was 10% Pine Tar and 5% Neem Oil or is that too much or too little? I have no experience with Neem Oil. Any thoughts on adding Neem to my recipe?