We run 3/4" migratory covers with a hole in the middle just big enough for a 70g cap to fit into. There are many sizes of jars you can get that have use the 70g lid. The cap is only about 1/2" deep which leaves a gap between the top bars and the holes where the syrup comes out.
We use 5lb economy jars for the most part. We also buy generic "mayonaisse" jars which i believe are about 2 1/2 to 3lb of syrup. Tje sizes and quantity of the holes in the 70G caps depends on time of year and size of nuc/hive. If it's colder add an extra hole,normally 3, do the same if you have an established hive you want to bulk up. Or the other way, if it's a young nuc use less holes,normally 2, of a smaller diameter, to make sure the girls can keep up with the open faucet of syrup.
When we are not feeding we just shove an old 70g cap into the cover to fill the hole. And we leave the jar exposed to the weather.
Of course this is the more labor intensive feeding, but sometimes necessary to ensure each hive get's proper nourishment. When we are getting ready to send a lot of bees off on pollination we open feed in barrels. We can put out 30,000lbs of sugar sryum in just a few hours like that, but also leads to uneven acquisition of nourishment. The stronger hives get more syrup since the have the womanpower to get more faster.
Aaron
I hope my explanation helps since i don't have any photos on hand of our system.
[ February 18, 2007, 08:11 PM: Message edited by: AstroZomBEE ]