Just back from a day of coaching from Mike Fedora, and it was well worth the time and money. In his Pro Shop, he has a big picture of Howard Hill at full draw, with most of the "steps" visibly in use.
I just made an appointment to get fittend for contacts, because even with his technique for us 4 - eyed guys, I could not overcome my head-positioning habits developed in 29 years of barebow shooting. So, off came my glasses, and I learned the other strategy, which worked like a charm. In fact, by the end of the day, I was shooting better his way, without my glasses, than I did my way, with glasses. My vision is not that terrible - I can pass the driver's test without them - but I do need the suckers.
I would recomend a session with Mike to anyone !