I wasn't done editing
After searing to seal in the juices, you can close the grill to prolong the cooking time and surround the steak with heat. However, if the fire is hot, this will quicken the cooking and make a rare/medium steak well done. In addition, closing the grill may also have the effect of drying, so be careful.
Dang. After proof reading, I don't think I've helped at all.
Good luck, my friend.