I used CK under BRHG all summer with good results. I thought I would try something different since we have had a string of cooler days here. I used it under PMSF and it turned out great! Very light, but plenty of hold. I just used more than my normal pool of CK and the foam. I posted a pic of my results in my Fotki.
Amy
2b/3a-ish at times
http://public.fotki.com/AHopewell1/hair/
PW hair

Currently using
Jessicurl HCC
Aloeba
CK
AG Liquid Effects