I said that I DO need to cut sooner since the salt hardens the soap quicker. If memory serves me correctly I would make soap in the morning and cut in the evening. It may even been as early as the afternoon. The do bear watching - just not as much as salt bars which are an entirely different thing.
Nearly all of my recipes are Lard at close to 50% with palm, coconut, shea butter, olive , soy wax and 5% castor. coconut oil is 10 to 14% with the amounts of palm and olive being the ones that vary the most. I usually would NOT put soy wax in either a brine or salt bar recipe.