I notice you have corks in your bars.What is the purpose of that?
So the jar part of the boardman feeder goes on the bee free side of the division board and you make a slot to push the boardman through to the bee space?The bar with the six holes in it has #8 screen stapled on the under side. In the summer months the temps. can be over 100 degrees. The thought is to help vent the hot air in the hive into the dead air space above the bars and then out the gable vents. ( I'm not using it yet. I'll watch to see if the bees start bearding when it gets hot.)
The #8 screen works great on the feeder. I just bent it up to meet the jar lids.
I corked 2 of the 3 holes for the first 2 days after install. The corks are out and lots of traffic in and out of the hive.
J-Rat
The interior is 36" long. I would love to build more, so we shall see how they do.What is the length? I think that it may be a bit short, but I could be wrong, I couldn't count the bars. You want to be close to 4 feet. Some people make them over 4 feet, but if you make it under 4 feet you minimize waste on the cover (assuming you are getting 8 foot lumber).
If they do fill it up just make a bigger one to the same comb size and then you can use this as a large nuc.