Re: Miller/baggie hybrid top feeder
The Miller feeder is my preference for a feeder. Holds a large volume and few bees drowned. Don't have to open hive and deal with bees to refill.
I coat the interior of the tank with melted wax. Need to seal the wood or mildew will grow. Also drilled a 1/2 inch hole(and covered with screen) on each side of the tank, near the top for ventilation.
Some may consider overkill, but I also place a bead of silicone on wood to wood joints to prevent leaking.
If you always do what you always did, you'll always get what you always got!