Hi Chris
this is a bit of a surprise to me I would have thought that the vast majority of people were sticking to the BSH guidelines. When you say that a 72 hr limit for all is not outside the norm, do you mean there are a lot of people doing this? One of the reasons I was concerned about this was because I didn't know of anyone else using this practice. I would be very keen to get a bit of feed back form anyone using such a practice.