I have had a long lang top bar hive for 3 years. The hive progressively got more and more defensive/ aggressive. As soon as you gently opened the top they were in your face. Last spring I did a split from this hive and added new queen. Did this in a standard lang with lower brood box and added a super later. This hive is pleasant to work with. The long lang did not survive the winter do to a mouse infestation, not doing top bars again. The split from last spring is doing very good now. I did not harvest any honey last fall or feed them and they wintered well. Before winter there were a small amount of hive beetles present. I have had the swiffer pad trap per plan on bottom board for 2 days and only trapped a few beetles. It was cool here so I took a quick look and not much beetle activity. That is the background information and here are my questions. Am I taking a chance doing a split this spring with hive beetles present . Can I add another brood box and move super to top without doing split this year. It would end up being from bottom to top, existing tall brood box with brood, add a new tall brood box with new foundation frames, move existing medium super with a mixture of brood and honey to top. Then a add medium super as season progresses. Then next year do splits. If I do stack what would be the best combination. Thanks for any advice, HRTULL