“I have not heard that you can fan train them. do you mean like an espalier, along a building? The building might get stained, especially with the red kind. If you are thinking of a hedge or a fedge, I'd see that: Less cutting, snipping, shaping... more fruit...“
I did mean like an espalier but actually I think you are right and I am confused - it’s actually training them more as a bush that I’ve read about. I like the fedge idea and it sounds more practical and manageable than espalier or fan training!! (Thinking about it logically it would grow every time your back was turned, wouldn’t it?) :-)