The real risk you are facing is not so much playing-all with wong out, but losing in plus counts at max bet. So long as you wong out when the count goes too far south, you will generally be all right. It's the big losses at max bet that hurt, and you will get them no matter whether you wong in or play-all. Don't get me wrong, wonging in is still better than play-all with wong out, but neutral and slightly negative counts is not generally where the big bucks are lost.