I invite you to move my 30 lb 5.5ft blood python while she is ready to feed, or even my 4ft gtp. I'm not sure what husbandry has to do with it but I bet you will find feeding in their cage is much preferred to the alternative.
Op,
Most of the experienced keepers here feed in their enclosures. There are many reason for this. 1.Dont get tagged, 2. Less stress on snake, 3. More likely to have successful feeding, 4. More efficient(think about feeding several snakes to hundreds.), 5. Less equipment required, 6. Safer for snake and handler. Unless you believe in the myth of cage aggression there are no valid reasons to feed outside the enclosure.
Times have changed while some keepers have not. They are not necessarily wrong but feeding outside the cage is certainly not the best option for some snake. Balls are pretty laid back compared to some so I just don't see the point. If your not afraid to move your snake in feed mode why are you afraid of cage aggression. Are they not in the same mode during both encounters? So what gives?
I say feed your snake in its home and leave him be for at least 24 hours. I can tell you from my experience with some very aggressive feeders including my ball I have never had an issue with aggression during regular handling. My 6ft brb is a missile at feeding time and can hardly be restrained from attacking the rat immediately but at all other times he is a good natured courious wonderfully behaved boy.
Do what you want but most here will say its a waste if time to feed outside.