The "catch" is a little "snag" as I raise and lower the presser foot. There is a little resistence at a point in between up and down and it makes a click noise. I took the end plate off and looked inside while raising and lowering it and couldn't see what the cause was. There is a definite small jolt, or letting go"jump" that happens with the noise, so I know it's catching on something. Then all of a sudden it will go away and raise and lower smoothly. Really odd. I'll check into the 6600 group, but I would love to hear from all of you too. Thanks.