Roger P wrote:By the way, anyone else find it hard to type with a bird jumping on the keyboard and attacking the mouse?

Definitely! LOL.
Yeah, Freddie appears fairly normal, and I concur that a vet visit is a good idea. Does he have an avian vet who already knows him well? Do you know when his last checkup was? Getting a good baseline on his health from a vet will let you develop some confidence that his normal behaviors are, in fact, normal -- and that's what makes it possible to recognize deviations from that baseline if they occur.
I'm guessing it will just take time for him to settle in and be comfortable. Don't expect too much, too soon. Although Scotty came to us stepping up and interacting, he's still "coming out of his shell" 3 months later. As a horse trainer once said, "It takes as long as it takes". If I'm reading between the lines correctly and your godfather has been in declining health, it may be that Freddie's world was sort of slowly deteriorating and now it's just blown up. He'll be missing his friend and his routine. It will take time for him to adjust -- these birds are smart, complex and social -- don't underestimate his need to assimilate all the changes in his life.
Was the Kaytee food what he was eating before? That's a sunflower-seed containing seed mix, and especially for an Amazon, it's not the healthiest base diet on the planet. You may want to read up on pelleted diets and eventually try to convert him to a diet that is pellet-dominated for the dry part and which also contains fruits, veggies, sprouts and healthy table food. There's a ton of info on diet out there. Also... I can say that, but I myself have one bird that eats a seed and pellet diet and really wants to pick out the seeds (but no sunflower) although he's a GCC and they can take a higher fat percentage. At least he eats fresh fruits and veggies voraciously. The other bird eats pellets just fine.. he thinks the Zupreem fruit flavored ones are a treat. But he won't eat fresh stuff well at all! He eats grapes and sprouts and that's all we've been able to get him to eat. So while an ideal diet sounds ideal, it may not be simple to convert him to one. Talk to your vet about this, too. On the one hand, it may be easier to make changes now while everything is changing, on the other it may be important not to throw too many changes at him.
I think you are doing a great job trying to take good care of Freddie, and as a relatively new bird owner, I can tell you that the paranoia does ease off a bit. I can't tell you it goes away entirely, but it does improve....
Seriously, I think a good reference book on your shelf would be a big boon. This one is good, although some here may consider it a bit conservative. Older editions, probably also pretty good, are available from Amazon resellers for as little as $4.
http://www.amazon.com/Complete-Pet-Bird-Owners-Handbook/dp/1895270251/ref=ntt_at_ep_dpi_1