Popping off a tube is only necessary if you have a vest without a pause setting, I think... the newer ones can easily pause and resume without disrupting the treatment cycle.
eta> yes, Amy's blog has been invaluable for information! <img src="i/expressions/face-icon-small-smile.gif" border="0">
eta> yes, Amy's blog has been invaluable for information! <img src="i/expressions/face-icon-small-smile.gif" border="0">