Hi Manie.
I haven't seen your specific question addressed that I can recall, but I'd like to offer this as a great resource for information in a similar vein.
Who knows? you might even find your answer in some of these great conversations, or find a link to the information through some of their sites?
Bill Alek also has a Yahoo group for discussion. you could join as ask there as well.
http://www.achieveradio.com/vortex-p...tech/index.php
This is Bill's site:
http://progressivetechcenter.org/
and another:
http://www.intalek.com/Index/Index.htm
I'm also given to understand that this man's work shows much promise:
http://www.veljkomilkovic.com/
Many great sources of information can be found from exploring the above. I've certainly learned a lot.