I’ve used one, though not split into two, and it’s really well made.
I agree, but then all the poly nucs are well made.
Interesting to check out the idiosyncrasies of the competition: tweaks that seemed useful at the design stage but not so much down the road and in the field.
The
Park 5-frame box was one of the first on the market years ago and it's only real drawback is the letterbox entrance. Closing a disc entrance is far easier, but the mould has been paid for... I forget who, but someone here filled the slots and fitted discs, but that stopped the use of the removable floor, useful for cleaning. Box arrives painted, which is an asset, and it can be converted from National to Lang easily.
Maisemore is a 6-frame box that can be extended by supers and
brood boxes, and has a Miller top feeder.
Paynes 6-frame box has an internal feeder which is not ideal; Paynes realised that and now offer a Miller feeder as an optional extra, as well as supers and broods. The boxes can sometimes be bought cheaply in sales.
BS aimed to iron out the flaws of the above and also produce a flexible box: the twin entrances and divider enable 2-frame splits to be made, the most economical in resources.
Sometimes bees abscond from one half to the other (presumably smelling pheromone via the mesh floor), and sometimes they chew through at the top ends of the divider, but although I've had a few where one side fails, generally they work well. BS plan to improve the Correx divider with one that's more rigid.
The feeder plughole allows fondant to be fed to a 6-frame in winter. The Maisemore supers and broods fit the BS, though cutting off the Maisie runners is necessary to maintain beespace.
Thorne stock
other designs but I've no experience of them, nor the
new Abelo model and nor the well-priced
Bee Equipment 6-frame, divisible and convertible into National & Lang. So far, I reckon the BS is the best of the lot (get your BKA to buy a pallet and the price drops to £34) but if you choose it stick to it (nothing more irritating than having three designs) and paint it outside and in the feeder. Masonry paint is recommended routinely, but
Murray McGregor suggests gloss, which bonds to the poly and lasts longer.