We use a WBC near the front door and regulars put money through the letter box in the front door or a tub inside the hive lid.
No issues with theft so far after my son stopped helping himself.
Try this method told to me by a large bee farmer in Northumberland.
With the new box above the old brood box apply copious amounts of smoke under lower box for say 4-5 mins such that all the bees and queen will go up into top box.
Remove bottom box and put it above a queen excluder on the new...
Just to report back the queen is laying again and has filled the brood chamber with brood which is now capped. I would say she stopped laying for at least three weeks in early June.
Like you i had CBPV and could not find an answer about wether i could use frames of comb etc again . I considered that if one of the treatments is to shake out the bees that the combs should be ok to use again.
So i put a new swarm in the hive and after about six weeks the bees are doing well...
This has happened to me too ! My best hive is now broodless but the queen is there happily walking around like she owns the place.
I will be interested to see any replies.
Been building a warming cabinet. Managed to get some 150mm cellotex for a tenner a sheet so nearly finished. Lets hope its a good season with lots of honey.
Read brother Adams book I think he would requeen most of his production hives in March. The Bees are unlikely to reject her as it's too early to requeen naturally.