Master Side: Removed all old ducting and plenums. Installed return and supply plenum on master-side system and sealed with mastic airlock. Sealed buckets to drywall with mastic. Installed ducting from supply to buckets. Installed new grilles. Installed return grilles. Used foam tape to eliminate filter bypass. Living Side: Removed all old ducting and plenums. Installed supply plenum on living room-side system and sealed with mastic airlock. Sealed buckets to drywall with mastic. Installed new grilles. Installed ducting from supply to buckets. Used foam tape to eliminate filter bypass.