Gryffindor Black brothers

What if Regulus hadn't been sorted into Slytherin? What if the Black brothers didn't hate each other? What if they escaped? What if they were together for the end of their time?

I decided that this story will go on to Harry's story instead of just stopping it at the attack of Voldermot on the Potters. I haven't decided if I'm going to do another book or just carry on in this one, but I will let you know soon