During a recent discussion among LCs (who also have rental stations) it was noted that pump yield was low (measured in teaspoons) among a number of women using the "Advanced" kit. When parts were switched to the original kit the yield was 3 - 4 ounces (90 - 120 ml) within minutes. When pressures were checked the Advanced registered a maximum of 210mm/Hg as opposed to 240mm/Hg with the original kit. Has anyone else noticed a difference in milk yield/supply between users of the Advanced vs. the original kits? Margery Wilson [log in to unmask]