I had no idea Soapmaker3 had a free downloadable calculator! When did they make that available? I don't recall seeing it about 18 months ago. I was still considering possibly purchasing SM3 until
SoapmakingFriend came along, so I haven't looked at the website in some time.
But I really do like the idea of a downloadable
lye calculator because there have been a few times when I had poor or NO internet access (due to my traveling habits) and making soap without an online calculator was an issue I didn't really want to face. Yes, I know there are ways to calculate the old fashioned way, but I don't carry around a book explaining how it's done. I just carry around my computer and without internet access, I get lost. I never thought of downloading the instructions to a file. I did used to have an android version of some
lye calculator on my phone in the past, but didn't really like it much.
But that is not on topic.
I almost always add FO to the oils in the main pot because I have forgotten to add it to so many batches when I left it to the last. It just helps me not to forget to add my fragrances.
Another trick that some people use is to put the FO inside the mold so they won't forget to add it before finishing the soap.
There have been times that adding to the oil didn't save me from having a problem with a finicky fragrance. Some fragrances need special handling, but that's a whole other thread.