A couple of years ago I bought the brown, earlier version of the Ultimate Bottom Board. I was very happy with the ones I bought and how well they ventilated the hive as well as the possibility of them being more hygienic. Now that I have more hives I wanted to buy more of the brown ones, not knowing that there was a new version out. When I saw the new, white ones I was a bit apprehensive. I thought the others did such a good job that any improvement might be a step backward. However, since using the new bottom boards I can say that they work very well, and there was not need for apprehension in my part. They are just as solid and well designed as the previous version, but with better entrance reducers and a better screen.
