Well I have the brood box in a plastic bag since I tore the hive remenants apart. I'll scorch it and make sure I mark it SHB scorch so I don't forget why I did it. Here we have to burn everything for AFB, so I'll be able to remember when I get inspected for transport.
From reading your looong tales of woe I think you had a wax moth problem. That is probably the cause of your bees absounding and not the SHB.
Wax moths go hand and glove with bees and are not really a problem if taken care of.
YOU MUST NOT let your bee population diminish in relationship to their hive space. Meaning that the bees should crowd ALL the frames both sides, if there is comb. IF your frames with comb have too few bees then the space should be reduced as in transferring the frames to a 4 or 5 frame nuc or what ever size box that will do the job of crowding the bees on the frames. Then if per chance there is some wax moth larva/eggs/worms hidden in the comb the bees will quickly clean that comb and expel the intruders. If you can see tunnels like affair covered with cobweb looking stuff and small black " balls or specks for want of a better word which is really deficant " then that is a sure fired sign that your bee population is too low. Bees will cope with both the Wax moth and the SHB as long as they are plentiful
For Small Hive Beetle hives should be kept infull sun. The populations once again should be plentiful and the will chase and harass the beetles out of the hive. If you have a screen botton board the SHB like to congregate up near the cover and that is where they will usually be found. If your hive has too much space, not enough bees, they cannot take care of the beetles.
I don't think your problem is AFB or anything else other than what I suggested.
You can PM me if you want more help.