FMIC, I can appreciate your difficulties, we live in a different world in comparison, I hope you manage to get your setup working whichever decision you take .

Geoff, we didn't go into too much detail about the specifics of the 0-rings experiments on the day as I was there more to see how a modern anaesthetic machine is built from scratch. I did find the research chemists presentation interesting though as she was trying to show us how they need to consider the interaction of agents on various materials such as o-rings, patient circuits, tubes ect and analyse what chemicals are given off in mass spectrometers to see if there could be anything going into the patient that could cause some adverse effect, maybe not seen immediately but which could manifest sometime later.