Beautiful customs Gordon (as usual) and your ability to describe the components and their use really help to put them in context which makes them even more interesting.
Having said that, they can also raise some questions, you referenced a much earlier post of yours describing a tanker unit you made and mentioned that some rural areas had 10,000L WCr units to supply water to appliances that were fighting the actual fire, you stated that these WCr units could dump their water into a temporary tank at the scene which the other appliances could feed from. My question is this - what kind of temporary tank is this? Is it rigid, collapsible, trailer, bladder? Who brings it to the scene (this is what happens when you arouse our curiosity)?
Gepetto