I limit it to two hours or 230pm, whichever comes first. Usually we are at about 1hr45min, some days it is only 1hr30 but the hour and a half days are either after he's done a 12 or more hour night OR if not, then he will do a 12 hour night that night to make up for the short nap. I was just moving towards consistency and trying to get things sorted - don't care if he wants to do these 12.5 - 13 hour nights and 1.5 hour naps or if he wants to do 11.5 hour nights and 2 hour naps, I just wish whatever it is, he would stick to it.