sup kuri, don't trim any fan leaves until you are about to harvest. the fan leaves are the power houses that collect the light, and removing them will harm your plant. only cut them if they are dieing. during the last few weeks of flowering many fan leaves will die and fall off naturally.

as for controling the harvest...it depends on how long they veg. the longer they veg the larger the harvest in most cases.

oder can be controled in many ways, including ozone gen., exaust fans, air freshener, or having a low oder strain.