Diesel exhaust doing particulate burn has also been known to get very hot.
At least ours are sensibly pointing straight up, unlike NSW & Qld where they
point out the side.
More seriously....
Complete rebuild of the plumbing on our Moore's 34 to un-strangle the pump,
and move tank fill to the 1900L/min LP stage instead of the 600L/min HP stage.
(more like 300L/min at any sensible pressure which doesn't threaten to blow
the top off the tank.)
Lockers set lower down the sides of all appliances so that everyone can reach
everything, in the style of the old Adelaide Fire Company 4WD pumpers like
Coro Valley 24P or, more recently, Blackwood CAFS.
Aside from the ergonomics - a safety issue - it lowers the vehicle CoG.
Retro-fit swing-down steps to give average height humans access to the top shelves.
Rural appliances with stowage for portable pump, generator & chainsaw/s as standard equipt.
Stowage for proper long-handled tools, rather than break-apart tools which... break.
Some sort of basic light mast as standard equipt on all medium & heavy appliances.
The little manual one on the TFS medium tanker would be perfectly adequate for 99% of tasks.
(It is also hard to play night games of strike team cricket when you can't light the field of play)
AED & O2 as standard equipt, for the sake of us old farts who represent a big
percentage of the aging CFS volunteer population.