Just the location of the a/b buttons. It seems like you would have to shift your hand down to reach them.
a/b buttons are in a great position with the start button being at the very bottom. I'll post a video once its complete to show you how good this thing sits in your hands
Small update, portable is all but done. Its taken me a little longer than expected but thats purely because I've been busy with other things lately. I literally just need to apply a couple of finishing touches and it's ready for a youtube video.