Hi
This is my first post so obviously I'm not an expert, but from everything I've read there is no 'right way' to feed them. It seems to depend on two things, temperament of the snake and preference of the owner, probably a bit more the former than the latter.
If George is fairly placid and has to have the feed wiggled in front of his nose before he strikes, I'd say you could probably feed him in the viv, if he lashes out at everything in reach when he's hungry then the feeding tub is probably the way to go.
That being said, if moving to a feeding tub is working for you and George then for what it's worth, I think that's the right way for you two, why change something that's working perfectly well.
Gryff