I spent the past couple days making a few nucs. They are the D-Coates style. They have ventilation holes in each end, and have 3/8" full width entrances. They are glued at every joint with Titebond II, and stapled with 1" glue-coated staples. I built 125 of them; kept me busy during the last few (snowy) days. We have to primer and paint them as soon as the weather shapes up. We have amost 2' of snow on the ground right now, and it is 30 degrees F.