Kathleen,

Walking piston:  The little yellow tab on the pump connector (new name for
the yellow elbow doohicky) needs to fit into the blue slot on the pump.  We
probably do it automatically when setting up a pump.  Moms don't.  I often
get pumps back with the pistons still attached, but the yellow tab outside
the blue slot.  These pistons do walk away when running and would need to
constantly be pushed in.  I now include laminated instruction cards in each
pump case.  How to put the piston assembly on is instruction #5 for both the
Standard and Advanced kits.  The laminated cards are from Medela.

My Advanced kits and Standard kits seem to generate the same amount of
suction when I measure it with a gauge.  However, I wonder if, for some
reason, the amount of milk expressed and/or stimulation provided is
different.  The same part fits against the breast.... but...I wonder if this
will be like the Classics vs. the Lactinas.  Yes, on a gauge they look
identical.  On the new 'Which Medela Breastpump Is Best For You?" guide, the
two pumps are given equal billing.  But, in actual use, many of us do see a
difference in milk production, comfort  and a mother's ability to maintain a
milk supply long term.  Any comments?  I do like the new kits better...but
now I'm wondering if I should carry both kits all the time.

Elizabeth Novelo Puzar, IBCLC