My 23 month old does not like to be carried for longer periods of time so I do just fine with a pouch. However, if I had to carry him for a very long time, I think that only a woven wrap like the Didymos would do the trick. He is virtually weightless when I wear him in a woven wrap - even the lightweight Ellaroo wrap works well (though I think a Storch or a Didymos would work better)
I am also wondering... what kind of BabyFairies do you have? An older style one or a newer style one with reinforced body and stronger straps?? I heard that the older ones are not ideal for heavier babies and that heavier material suports their weight better. That's why people like Kozys so much for toddlers.