iddee thanks for photos of bee vac, i presume that the vacuum hose goes in front to suck the bees.. and in the back for conecting a shop vac or else... for what is the holes in the sides of box? on the top is lexan or vinyl, plexi glass?
here in Croatia the bees are Carnica (Carnolian) and they are agressive only if honey flow is stopt. also in the spring when salix blooms they are bit a itchy, somtimes on chestnut they like to stung when are no nectar flow only pollen. in my case bees are in near the chesnut forest in willage near Zagreb in a nature park. i put water drink for bees that hawe near by to take a break and focus on a nectar collecting. i pass pollen harvesting becauset that pollen is a great value for summer bees and quiet meadow in the july and august bees for winter.