wow don, you have more patience than i do, i will chime in on what tefer said:
"Don, you may be in for a surprise when the robbing starts and continues with those.
They work great for watering new hives that your starting.
It's when you put sugar syrup into them that the real fun starts.
Your close enough that I could have mailed you a box full."
i only use boardmans for water as well, and funny i don't have to file them down, i have to figure out how to keep them propped up into the entrance, without tipping over(deep side of a bottom board), and won't fit in my entrance reducers, but some of my bottom boards are older, and most of my e/rs i make myself.
just curious what top feeders were you using that the bees weren't interested in? and also where did you buy your boardmans?