I managed to get 6 down to 44% resources this after' with a LOT of stuff in there and the purge did work even if rather feebly.

I tried to get 8 to drop down (very easy just edit a few plants!!) and it soon gave me a message about dropping to critical level.  Even then the purge didint'work BUT something that was very strange was that I did a quick preview renderof my newly edited trees and after that'd finished and closed out the resources went from 18% to 65% all on their little own.

Hmmmmmmmmmmmmmmmmmm

Gill