i did get a new grip for my 20" that has the grip plate for automatic hand placement, looks like a psg1 grip, gonna have to see how that feels when it gets here
Another +1 for the magpul MIAD, the interchangeable backstraps are great, especially if you have larger hands. I am using the largest option in conjunction with an enhanced trigger guard on my Spikes Tactical ST-15 M4-LE, very happy with that setup.