RE: string hitting arm
Do you shoot with a string loop or do you shoot directly off the string? If you can't shorten the DL, eliminating the string loop can help. Also, if your release is adjustable to make it shorter, that might help too. If it isn't adjustable, see if you can find one that is shorter and try it out. I know when I was bow shopping and tried a bunch of bows out, my arm was nice and purple from shooting bows that were too long for me...