Since 1999 we have developed Mokka, a Geant4 full event simulation allowing a complete reconstruction and energy flow analysis to evaluate the detector designs for the Future Linear Collider (FLC). For the first time the next Mokka release includes code developed elsewhere and committed directly into the Mokka CVS repository in coordination with us. It's so time to recall some Mokka main guidelines which should (or not) be held for this new Mokka era.