Ken,
This guy is using a PST etalon, Lunt BF and Baader D-ERF with excellent results.
jp-brahic.chez-alice.fr/page%20perso.htm
(use google to translate from french)
and his latest results:
www.cloudynights.com/ubbthreads/showflat...d/sb/5/o/all/fpart/1
I think they speak for themselves.
Michael.