The most common way to do the OH8 is to face upwind, feet square to the wind, to give yourself a reference plane (draw line from one foot to the other). Unfortunately, most of us geezers can't bend backwards enough to see the top of the circle, so about 90% do the OH8 "out in front", meaning upwind. That's bad!
IMO, admitting that we can't flex enough to get the OH8 straight overhead, we might be better off to concede to that fact. Then, the moves would be to climb to the top of the circle with your feet 90 deg to the climb, move right foot (CCW flying assumed) another 90 deg, so the feet are then square to the climb, but you're facing downwind. Now, your OH8 will be "out in front", but on the downwind side of the circle, giving much better line tension, which should improve the shape a bunch. It's something I want to work on, but so far, all I've done is to scare myself silly and nearly crash. Some "dry flying" at home would be a huge help to get the feet moving at the correct time. It's either that, or "Hot Yoga" just prior to our flights. Ewww!
Steve