Yes, I did try back-to-back CE.
First, I tried them ( 3-4 times only)at the beginning of my NB program - 2 years ago. They had pretty powerful effect on me.
The second time I tried them recently. I did not noticed any effect at all.
I do not have sauna... I never liked the heat.
I know that you are working with NB practitioner and you are participating in NB forum.
Do you meet people who are at least 80-90 %% follow the program. I still wondering if it is possible? :-)