Id assumed from reading up that the machine had to be fully emptied of gas after every fight. However with the cylinder valve closed and the pipework vented, it is after all now just a CO2 fire extinguisher. We all walk past those every day and it would be considered dangerous if they were removed.

If I do go for a very conventional flipper then I dont think that the need for a remote kill is quite so important than it is for other types. If memory serves me, Typhoon has a remote kill (or at very least a switch marked kill which we should hope means that)