Absolem,
Those pics are adorable. You have yourself a cute birdy that loves to be with you.
-Perhaps you could develop a call back sound to him, so he knows you are there.
-try leaving a low radio or put on a tv, low volume, where he can see it.
-try letting him be with you for meals on his own tabletop playstand (you can pick up a basic but nice natural wood and rope, lightweight unit for about $15 (let me know if you want links to a couple of places that sell it). It might make a huge difference for him/her to have his own place to hang out in the same rooms where you are, on top of table, or even a box or dresser.
-I taught Pritti how to jingle a special bell when he wants a personal visit for a reason. He used to just scream, but now he'll try the bell first. The key is -- someone has to respond to the bell. That's not to say he hasn't slammed the bell in to the side of the cage now and then when the jingling doesn't work. But it's still better than screaming. I would play with the bell whenever I went to his cage and made a big deal about it, like I loved it and had fun with it. So he figured out, I guess, that he could woo me over with it. Haha.
-Also, try the things around t he house that he likes as toys. Sounds like he likes YOUR things. So if they are safe, givem them to him to chew up or roll around. If he likes your spoon, give him one. If he likes your little box, give it to him. Give him one of your old (clean) t-shirts or thick sock to snuggle to. Etc.
-Play some games with him when he isn't in a screaming mode, like rolling a ball around on the floor with him, or teach him a trick - like turning around on his perch, something.
-maybe he would like a mirror.
-maybe when you are going to walk away for a while, you could leave him with a dish of some healthy delicious snacks like a variety of fresh veggies or some fruit, or a piece of corn on the cob to keep him busy with that.
-don't yell at him, not that I'm saying you are, but if you ever feel inclined to, it might just make it worse.
-try toys that are completely different than what he has and what you think he will like. I always used to buy Pritti the hanging wood toys of all nice colors and shapes and he pretty much ignored them except when I would touch them. But, when I finally started to pick up lots of foot toys, I realized he loves them so much. I also buy small items from the baby dept, like rattles, teethers, and from kitchen, like plastic measuring spoon sets and cups. He loves them. Most especially he can spend long periods of time on his own pushing around rolling toys on the floor or bottom of cage.
Keep us posted.