Really, it is unaffordable for almost anyone to use sandalwood e.o. for soap. And not worth it, b/c of what the lye might do to it.
Believe me, I am with you on the yearning, but it it is not practical. IMO, it is better to find a good FO that comes as close as close to possible to meeting your requirements (that is not easy either, my current FO testing total is in the 30's, and I will probably keep going whenever there is a new one.)
Sometimes its hard switching gears, if you dont want to use an FO, you might just not make it. I wanted to make a Rose EO, 300.00/oz, there bouts, I didnt care about the cost.......I just wanted the soap. Then I thought, after posting on this forum that it would be best to use the Rose in a lotion....something that wouldnt go down the drain. I changed my mind about the soap.
I just have to chime in--I got a bottle of amyris eo in a free sample pack and covered the label and had my husband smell it. He guessed it was sandlewood.
Maybe it's similar to an untrained nose...he is not a soaper.