This is too freaky. Only yesterday did I start trying to bang out what I was trying to do (took our admins a long time to install the module). Of course, they installed v 0.40, so I appreciate the heads up.

thanks,
thor

Update: Everything worked beautifully. The only snag that I've hit is that formulae have a limit of not being able to reference rows over 16384. I wonder what would happen if I changed that in Formula.pm...;)