Thank you all for the lovely comments.
The soap is all made with Palm, Coconut, Olive and Castor oils. I only use Essential Oils as most of my customers prefer them to FO's.
The EO's are reasonably economical to use in Whipped soap (and, by the way, when are we getting an abbreviation for this method ?).
I use on average 25 ml EO per 1010 g oils and the aroma is very strong and lasts right to the end of the bar.
WS (whipped soap ?) also seems to cure faster than CP. Someone once suggested that may be due to the air which has been whipped into it. I do not have the patience to wait for CP to cure and the WS bars are ready to use in just 2 weeks. I have even used WS after 1 weeks cure and it was great.
Sugar added at 60 g per 1010 g oil also produces a nice hard bar.