If I don't have a passenger in the front seat I'm just not going to be able to reach the extinguisher, so I'd better have one.
Possibly a serious safety issue here? Isn't by default, the place where Robbo put the fire extinguisher on the forward left hand side of the instrument console (i.e. in front of the L/H pax's feet?)
Here in the UK all G Reg A/C have the fire extinguisher mounted below the CB panel which
should be in reach of the pilot. This I believe is/was a CAA requirement.