Hi mate,
There are various threads discussing the + & - of cutting bladders and thus creating an emulsion shock . You can find the latest chat in this thread:
http://www.oople.com/forums/showthread.php?t=100145
Simon Moss has a fairly decent base setup for Astro- check out the setup sheets on either Schumacher or Petit RC.
Off the top of my head he uses #3 piston front and rear with the rear pistons drilled. I can't remember the specifics though.
