Not sure why people are using the logic that because Gimbelstob wasn't as successful as whoever when he played that his opinion are therefore void. If he's right he's right regardless, and vice versa.
Remember, Toni Nadal was never a top tennis player and he managed to impart enough lessons to nurture Rafael into one of the greatest players of all time. Richard Williams wasn't, either, nor Adolf Kacovsky - two guys who clearly knew something about tennis.
Original Pro Staff 85, leaded to 370g, hybrid poly/syn gut set-up, 48-52-ish lbs.