If a second top entrance was of any particular importance, do you not think this would have been a standard fixture or fitment? No? Surprise, surprise. It has been tried before and will be tried again. The National standard has been around since about 1920; it was developed on experience of about the previous 50 years; no hives since have two entrances as a normal method of operation.
Don't try to re-invent the wheel, especially with zilch experience under your belt. It won't work for the variety of reasons given in the thread.
Bees will normally propolise any gauze ventilation placed over the crownboard feed hole. They obviously don't want that ventilation; they want to conserve warmth and regulate it under their control. Bees will build comb and generally defeat you attempts at some time. Bees do not need large volumes of air at the top of the hive - that will be the warmest part of the hive in winter and be losing heat energy hand over fist.
Yes, you have it pretty well all wrong. If you think through your proposals with any sense of practical application, you will realise the folly of the assumtions you have made.
This post may be too straight and direct. Ignore the advice if you wish, but do tell all re your experiences with the arrangement; it may help to deter a few others from trying it.
Regards, RAB
