Wow, it looks like xcelprinting.com jumped in without getting the facts and thought he could handle two macaws after just having his grey for a week or so, you have not seen the full personality of your grey yet and that may surprise you with what you will find.
You need to concentrate on Meggie right now, you have made a committment to her and it takes time to develop a relationship and she is still just a baby and has a lot of growing up to do and I think you do too.
I hope Meggie doesn't get to screaming but birds are loud thats just the way they are accept it or find a different kind of companion.
You seem like the typical person who sees a pretty parrot that allows you to touch them and maybe talks to you, you think it is so cute and you decide to buy it then you realize later that this bird has other habits that are hard to deal with, hello, do your homework and find out what you are getting yourself into for like the others have already said it is the birds that suffer for our ignorance.