Fit it on the driver's side, then if you ever need it you don't have to think - just reach down(up if the car's on its roof) and the extinguisher is in your hand
Drivers seat too low now and sliding mech fouls on extinguisher ... Will have to fashion a lasso from bootlace while upside down and use my skills from years hooking a duck at fair ... what could go wrong ?
Manifold out ... with a little lateral thinking . Span front wheel to turn driveshaft which , pushed against lcb and gracefully wound out the exhaust through the gap. Now gonna try same trick in reverse to get other one in ... may need hammer persuasion !