Everybody has their preferences...some of them dearly held and often the exact opposite of the way other folk do it. Its only wrong if it is wrong for you.
Castellations? Never use them and would rip them out if in any boxes as they slow down manipulations and you cannot slide the frames across without moving every single one of them.
Spacings? The standard UK spacing was changed many years ago from frames fitting 11 Hoffmans in a Smith/National brood box to one in which 12 fit. Our historic unit came from the early 1950's and was all 11 frame. We have stayed with that spacing right up to today so get our frames specially made. The world neither started nor ends with 'Thornes standard' which seems, especially in amateur circles, to be seen as the only proper frames. There are many makers, and all are subtly different unless they are simply Thornes copies. The illustrations earlier in the thread illustrates one point well. British frames are frail creatures, and the thin bottom bars are a particular example...and some other makers now work with thicker wider bottom bars that are less fragile. They could be far more robust at little extra cost (we have gone that way in our business) but that does not suit everyone.
Dummy boards? We do not have a single dummy board in our entire business. Bonfire fodder in my opinion, and indeed when we took over the unit of another outfit that was exactly the fate of around 2500 cedar (and no doubt expensive) dummy boards. Gives you that bit more time before swarming happens, averaging (between our various hive types) 10% more brood area before congestion sets in. Queen rolling is an out and out rarity Damage to the queen (whilst still very rare) is most commonly caused by inaccurate lifting out of the frames and the queen has been on the side bar and gets nipped.
We do what we do...others do what they do. Don't quite get the zeal to convert others. Our craft/trade is plagued by such people......and I do not use that word lightly.
On the subject of elephants........one of my staff told me this story about elephants.
She asked how you would know if elephants had been having *** in your garden? It is if you wake up in the morning and the lawn is a muddy mess, the rose bushes are all broken and trampled, and the bin bag is missing.
Off to wax frames all day...