Spark Plug Replacement HELL!
Normal car = 30mins
Crossfire = Bloody knuckles, bad back, argument with girlfriend, a pain in the ***.
So you wanna change your spark plugs? My advice is dont unless you want the above.
Actually my suggestion would be to let that 'I know everything about cars' dude down your local bar do it. Buy him a drink, throw him a 20 and then watch him self explode.
The 2 plugs at the back are a pain like you have never felt!!