Well, I thought it would be a good idea if I chimed in with an update on little Loki.
He's a little over 6 months now, and I came close to sending him back to the breeder on a few occasions. Even went as far as packing him up in the cage, driving the 140km to the breeder's property, and handing him over, but I couldn't do it. Decided to persevere.
I'm glad I did.
I wound up going back to giving him hand feeds three times a day in addition to the most varied diet I could come up with. Had my earplugs in all waking hours. Just gritted my teeth with it.
Eventually he got more interested in his usual food, and would only take a few gulps of his liquid feed before losing interest. About a month after that the screaming stopped all of a sudden. He's now happy to sit quietly on my shoulder for hours on end.
He steals chunks of my toast en route to my mouth of a morning, and loves pilfering my muesli and yoghurt. After which he happily wipes his beak clean on my beard.
Of an evening he sits on my chest, tucks his head under my chin and purrs like a cat. His latest trick is sticking his head down my shirtfront and going to sleep.
He is somewhat agro or standoffish with my hands and fingers. It's like he's very at home with my face and shoulders, but the hands still spook him at times. Maybe this will pass.
All in all, despite nearly driving me off the deep end on a number of occasions, I love the little bugger
Thanks for all the support and advice from everyone here. I'll be a frequent visitor, and I'll try to upload some pics of my little buddy shortly.